Release v1.6.0 (#324)

* Update version and changelog for v1.6.0
* Update docs
diff --git a/docs/epy/googleapiclient._auth-pysrc.html b/docs/epy/googleapiclient._auth-pysrc.html
new file mode 100644
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--- /dev/null
+++ b/docs/epy/googleapiclient._auth-pysrc.html
@@ -0,0 +1,201 @@
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+      <span class="breadcrumbs">
+        <a href="googleapiclient-module.html">Package&nbsp;googleapiclient</a> ::
+        Module&nbsp;_auth
+      </span>
+    </td>
+    <td>
+      <table cellpadding="0" cellspacing="0">
+        <!-- hide/show private -->
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+        <tr><td align="right"><span class="options"
+            >[<a href="frames.html" target="_top">frames</a
+            >]&nbsp;|&nbsp;<a href="googleapiclient._auth-pysrc.html"
+            target="_top">no&nbsp;frames</a>]</span></td></tr>
+      </table>
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+  </tr>
+</table>
+<h1 class="epydoc">Source Code for <a href="googleapiclient._auth-module.html">Module googleapiclient._auth</a></h1>
+<pre class="py-src">
+<a name="L1"></a><tt class="py-lineno"> 1</tt>  <tt class="py-line"><tt class="py-comment"># Copyright 2016 Google Inc. All Rights Reserved.</tt> </tt>
+<a name="L2"></a><tt class="py-lineno"> 2</tt>  <tt class="py-line"><tt class="py-comment">#</tt> </tt>
+<a name="L3"></a><tt class="py-lineno"> 3</tt>  <tt class="py-line"><tt class="py-comment"># Licensed under the Apache License, Version 2.0 (the "License");</tt> </tt>
+<a name="L4"></a><tt class="py-lineno"> 4</tt>  <tt class="py-line"><tt class="py-comment"># you may not use this file except in compliance with the License.</tt> </tt>
+<a name="L5"></a><tt class="py-lineno"> 5</tt>  <tt class="py-line"><tt class="py-comment"># You may obtain a copy of the License at</tt> </tt>
+<a name="L6"></a><tt class="py-lineno"> 6</tt>  <tt class="py-line"><tt class="py-comment">#</tt> </tt>
+<a name="L7"></a><tt class="py-lineno"> 7</tt>  <tt class="py-line"><tt class="py-comment">#      http://www.apache.org/licenses/LICENSE-2.0</tt> </tt>
+<a name="L8"></a><tt class="py-lineno"> 8</tt>  <tt class="py-line"><tt class="py-comment">#</tt> </tt>
+<a name="L9"></a><tt class="py-lineno"> 9</tt>  <tt class="py-line"><tt class="py-comment"># Unless required by applicable law or agreed to in writing, software</tt> </tt>
+<a name="L10"></a><tt class="py-lineno">10</tt>  <tt class="py-line"><tt class="py-comment"># distributed under the License is distributed on an "AS IS" BASIS,</tt> </tt>
+<a name="L11"></a><tt class="py-lineno">11</tt>  <tt class="py-line"><tt class="py-comment"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</tt> </tt>
+<a name="L12"></a><tt class="py-lineno">12</tt>  <tt class="py-line"><tt class="py-comment"># See the License for the specific language governing permissions and</tt> </tt>
+<a name="L13"></a><tt class="py-lineno">13</tt>  <tt class="py-line"><tt class="py-comment"># limitations under the License.</tt> </tt>
+<a name="L14"></a><tt class="py-lineno">14</tt>  <tt class="py-line"> </tt>
+<a name="L15"></a><tt class="py-lineno">15</tt>  <tt class="py-line"><tt class="py-docstring">"""Helpers for authentication using oauth2client or google-auth."""</tt> </tt>
+<a name="L16"></a><tt class="py-lineno">16</tt>  <tt class="py-line"> </tt>
+<a name="L17"></a><tt class="py-lineno">17</tt>  <tt class="py-line"><tt class="py-keyword">import</tt> <tt class="py-name">httplib2</tt> </tt>
+<a name="L18"></a><tt class="py-lineno">18</tt>  <tt class="py-line"> </tt>
+<a name="L19"></a><tt class="py-lineno">19</tt>  <tt class="py-line"><tt class="py-keyword">try</tt><tt class="py-op">:</tt> </tt>
+<a name="L20"></a><tt class="py-lineno">20</tt>  <tt class="py-line">    <tt class="py-keyword">import</tt> <tt class="py-name">google</tt><tt class="py-op">.</tt><tt class="py-name">auth</tt> </tt>
+<a name="L21"></a><tt class="py-lineno">21</tt>  <tt class="py-line">    <tt class="py-keyword">import</tt> <tt class="py-name">google_auth_httplib2</tt> </tt>
+<a name="L22"></a><tt class="py-lineno">22</tt>  <tt class="py-line">    <tt id="link-0" class="py-name" targets="Variable googleapiclient._auth.HAS_GOOGLE_AUTH=googleapiclient._auth-module.html#HAS_GOOGLE_AUTH"><a title="googleapiclient._auth.HAS_GOOGLE_AUTH" class="py-name" href="#" onclick="return doclink('link-0', 'HAS_GOOGLE_AUTH', 'link-0');">HAS_GOOGLE_AUTH</a></tt> <tt class="py-op">=</tt> <tt class="py-name">True</tt> </tt>
+<a name="L23"></a><tt class="py-lineno">23</tt>  <tt class="py-line"><tt class="py-keyword">except</tt> <tt class="py-name">ImportError</tt><tt class="py-op">:</tt>  <tt class="py-comment"># pragma: NO COVER</tt> </tt>
+<a name="L24"></a><tt class="py-lineno">24</tt>  <tt class="py-line">    <tt id="link-1" class="py-name"><a title="googleapiclient._auth.HAS_GOOGLE_AUTH" class="py-name" href="#" onclick="return doclink('link-1', 'HAS_GOOGLE_AUTH', 'link-0');">HAS_GOOGLE_AUTH</a></tt> <tt class="py-op">=</tt> <tt class="py-name">False</tt> </tt>
+<a name="L25"></a><tt class="py-lineno">25</tt>  <tt class="py-line"> </tt>
+<a name="L26"></a><tt class="py-lineno">26</tt>  <tt class="py-line"><tt class="py-keyword">try</tt><tt class="py-op">:</tt> </tt>
+<a name="L27"></a><tt class="py-lineno">27</tt>  <tt class="py-line">    <tt class="py-keyword">import</tt> <tt class="py-name">oauth2client</tt> </tt>
+<a name="L28"></a><tt class="py-lineno">28</tt>  <tt class="py-line">    <tt class="py-keyword">import</tt> <tt class="py-name">oauth2client</tt><tt class="py-op">.</tt><tt class="py-name">client</tt> </tt>
+<a name="L29"></a><tt class="py-lineno">29</tt>  <tt class="py-line">    <tt id="link-2" class="py-name" targets="Variable googleapiclient._auth.HAS_OAUTH2CLIENT=googleapiclient._auth-module.html#HAS_OAUTH2CLIENT"><a title="googleapiclient._auth.HAS_OAUTH2CLIENT" class="py-name" href="#" onclick="return doclink('link-2', 'HAS_OAUTH2CLIENT', 'link-2');">HAS_OAUTH2CLIENT</a></tt> <tt class="py-op">=</tt> <tt class="py-name">True</tt> </tt>
+<a name="L30"></a><tt class="py-lineno">30</tt>  <tt class="py-line"><tt class="py-keyword">except</tt> <tt class="py-name">ImportError</tt><tt class="py-op">:</tt>  <tt class="py-comment"># pragma: NO COVER</tt> </tt>
+<a name="L31"></a><tt class="py-lineno">31</tt>  <tt class="py-line">    <tt id="link-3" class="py-name"><a title="googleapiclient._auth.HAS_OAUTH2CLIENT" class="py-name" href="#" onclick="return doclink('link-3', 'HAS_OAUTH2CLIENT', 'link-2');">HAS_OAUTH2CLIENT</a></tt> <tt class="py-op">=</tt> <tt class="py-name">False</tt> </tt>
+<a name="L32"></a><tt class="py-lineno">32</tt>  <tt class="py-line"> </tt>
+<a name="L33"></a><tt class="py-lineno">33</tt>  <tt class="py-line"> </tt>
+<a name="default_credentials"></a><div id="default_credentials-def"><a name="L34"></a><tt class="py-lineno">34</tt> <a class="py-toggle" href="#" id="default_credentials-toggle" onclick="return toggle('default_credentials');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="googleapiclient._auth-module.html#default_credentials">default_credentials</a><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
+</div><div id="default_credentials-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="default_credentials-expanded"><a name="L35"></a><tt class="py-lineno">35</tt>  <tt class="py-line">    <tt class="py-docstring">"""Returns Application Default Credentials."""</tt> </tt>
+<a name="L36"></a><tt class="py-lineno">36</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt id="link-4" class="py-name"><a title="googleapiclient._auth.HAS_GOOGLE_AUTH" class="py-name" href="#" onclick="return doclink('link-4', 'HAS_GOOGLE_AUTH', 'link-0');">HAS_GOOGLE_AUTH</a></tt><tt class="py-op">:</tt> </tt>
+<a name="L37"></a><tt class="py-lineno">37</tt>  <tt class="py-line">        <tt class="py-name">credentials</tt><tt class="py-op">,</tt> <tt class="py-name">_</tt> <tt class="py-op">=</tt> <tt class="py-name">google</tt><tt class="py-op">.</tt><tt class="py-name">auth</tt><tt class="py-op">.</tt><tt class="py-name">default</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
+<a name="L38"></a><tt class="py-lineno">38</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">credentials</tt> </tt>
+<a name="L39"></a><tt class="py-lineno">39</tt>  <tt class="py-line">    <tt class="py-keyword">elif</tt> <tt id="link-5" class="py-name"><a title="googleapiclient._auth.HAS_OAUTH2CLIENT" class="py-name" href="#" onclick="return doclink('link-5', 'HAS_OAUTH2CLIENT', 'link-2');">HAS_OAUTH2CLIENT</a></tt><tt class="py-op">:</tt> </tt>
+<a name="L40"></a><tt class="py-lineno">40</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">oauth2client</tt><tt class="py-op">.</tt><tt class="py-name">client</tt><tt class="py-op">.</tt><tt class="py-name">GoogleCredentials</tt><tt class="py-op">.</tt><tt class="py-name">get_application_default</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
+<a name="L41"></a><tt class="py-lineno">41</tt>  <tt class="py-line">    <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
+<a name="L42"></a><tt class="py-lineno">42</tt>  <tt class="py-line">        <tt class="py-keyword">raise</tt> <tt class="py-name">EnvironmentError</tt><tt class="py-op">(</tt> </tt>
+<a name="L43"></a><tt class="py-lineno">43</tt>  <tt class="py-line">            <tt class="py-string">'No authentication library is available. Please install either '</tt> </tt>
+<a name="L44"></a><tt class="py-lineno">44</tt>  <tt class="py-line">            <tt class="py-string">'google-auth or oauth2client.'</tt><tt class="py-op">)</tt> </tt>
+</div><a name="L45"></a><tt class="py-lineno">45</tt>  <tt class="py-line"> </tt>
+<a name="L46"></a><tt class="py-lineno">46</tt>  <tt class="py-line"> </tt>
+<a name="with_scopes"></a><div id="with_scopes-def"><a name="L47"></a><tt class="py-lineno">47</tt> <a class="py-toggle" href="#" id="with_scopes-toggle" onclick="return toggle('with_scopes');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="googleapiclient._auth-module.html#with_scopes">with_scopes</a><tt class="py-op">(</tt><tt class="py-param">credentials</tt><tt class="py-op">,</tt> <tt class="py-param">scopes</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
+</div><div id="with_scopes-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="with_scopes-expanded"><a name="L48"></a><tt class="py-lineno">48</tt>  <tt class="py-line">    <tt class="py-docstring">"""Scopes the credentials if necessary.</tt> </tt>
+<a name="L49"></a><tt class="py-lineno">49</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
+<a name="L50"></a><tt class="py-lineno">50</tt>  <tt class="py-line"><tt class="py-docstring">    Args:</tt> </tt>
+<a name="L51"></a><tt class="py-lineno">51</tt>  <tt class="py-line"><tt class="py-docstring">        credentials (Union[</tt> </tt>
+<a name="L52"></a><tt class="py-lineno">52</tt>  <tt class="py-line"><tt class="py-docstring">            google.auth.credentials.Credentials,</tt> </tt>
+<a name="L53"></a><tt class="py-lineno">53</tt>  <tt class="py-line"><tt class="py-docstring">            oauth2client.client.Credentials]): The credentials to scope.</tt> </tt>
+<a name="L54"></a><tt class="py-lineno">54</tt>  <tt class="py-line"><tt class="py-docstring">        scopes (Sequence[str]): The list of scopes.</tt> </tt>
+<a name="L55"></a><tt class="py-lineno">55</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
+<a name="L56"></a><tt class="py-lineno">56</tt>  <tt class="py-line"><tt class="py-docstring">    Returns:</tt> </tt>
+<a name="L57"></a><tt class="py-lineno">57</tt>  <tt class="py-line"><tt class="py-docstring">        Union[google.auth.credentials.Credentials,</tt> </tt>
+<a name="L58"></a><tt class="py-lineno">58</tt>  <tt class="py-line"><tt class="py-docstring">            oauth2client.client.Credentials]: The scoped credentials.</tt> </tt>
+<a name="L59"></a><tt class="py-lineno">59</tt>  <tt class="py-line"><tt class="py-docstring">    """</tt> </tt>
+<a name="L60"></a><tt class="py-lineno">60</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt id="link-6" class="py-name"><a title="googleapiclient._auth.HAS_GOOGLE_AUTH" class="py-name" href="#" onclick="return doclink('link-6', 'HAS_GOOGLE_AUTH', 'link-0');">HAS_GOOGLE_AUTH</a></tt> <tt class="py-keyword">and</tt> <tt class="py-name">isinstance</tt><tt class="py-op">(</tt> </tt>
+<a name="L61"></a><tt class="py-lineno">61</tt>  <tt class="py-line">            <tt class="py-name">credentials</tt><tt class="py-op">,</tt> <tt class="py-name">google</tt><tt class="py-op">.</tt><tt class="py-name">auth</tt><tt class="py-op">.</tt><tt class="py-name">credentials</tt><tt class="py-op">.</tt><tt class="py-name">Credentials</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
+<a name="L62"></a><tt class="py-lineno">62</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">google</tt><tt class="py-op">.</tt><tt class="py-name">auth</tt><tt class="py-op">.</tt><tt class="py-name">credentials</tt><tt class="py-op">.</tt><tt class="py-name">with_scopes_if_required</tt><tt class="py-op">(</tt> </tt>
+<a name="L63"></a><tt class="py-lineno">63</tt>  <tt class="py-line">            <tt class="py-name">credentials</tt><tt class="py-op">,</tt> <tt class="py-name">scopes</tt><tt class="py-op">)</tt> </tt>
+<a name="L64"></a><tt class="py-lineno">64</tt>  <tt class="py-line">    <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
+<a name="L65"></a><tt class="py-lineno">65</tt>  <tt class="py-line">        <tt class="py-keyword">try</tt><tt class="py-op">:</tt> </tt>
+<a name="L66"></a><tt class="py-lineno">66</tt>  <tt class="py-line">            <tt class="py-keyword">if</tt> <tt class="py-name">credentials</tt><tt class="py-op">.</tt><tt class="py-name">create_scoped_required</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
+<a name="L67"></a><tt class="py-lineno">67</tt>  <tt class="py-line">                <tt class="py-keyword">return</tt> <tt class="py-name">credentials</tt><tt class="py-op">.</tt><tt class="py-name">create_scoped</tt><tt class="py-op">(</tt><tt class="py-name">scopes</tt><tt class="py-op">)</tt> </tt>
+<a name="L68"></a><tt class="py-lineno">68</tt>  <tt class="py-line">            <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
+<a name="L69"></a><tt class="py-lineno">69</tt>  <tt class="py-line">                <tt class="py-keyword">return</tt> <tt class="py-name">credentials</tt> </tt>
+<a name="L70"></a><tt class="py-lineno">70</tt>  <tt class="py-line">        <tt class="py-keyword">except</tt> <tt class="py-name">AttributeError</tt><tt class="py-op">:</tt> </tt>
+<a name="L71"></a><tt class="py-lineno">71</tt>  <tt class="py-line">            <tt class="py-keyword">return</tt> <tt class="py-name">credentials</tt> </tt>
+</div><a name="L72"></a><tt class="py-lineno">72</tt>  <tt class="py-line"> </tt>
+<a name="L73"></a><tt class="py-lineno">73</tt>  <tt class="py-line"> </tt>
+<a name="authorized_http"></a><div id="authorized_http-def"><a name="L74"></a><tt class="py-lineno">74</tt> <a class="py-toggle" href="#" id="authorized_http-toggle" onclick="return toggle('authorized_http');">-</a><tt class="py-line"><tt class="py-keyword">def</tt> <a class="py-def-name" href="googleapiclient._auth-module.html#authorized_http">authorized_http</a><tt class="py-op">(</tt><tt class="py-param">credentials</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
+</div><div id="authorized_http-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="authorized_http-expanded"><a name="L75"></a><tt class="py-lineno">75</tt>  <tt class="py-line">    <tt class="py-docstring">"""Returns an http client that is authorized with the given credentials.</tt> </tt>
+<a name="L76"></a><tt class="py-lineno">76</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
+<a name="L77"></a><tt class="py-lineno">77</tt>  <tt class="py-line"><tt class="py-docstring">    Args:</tt> </tt>
+<a name="L78"></a><tt class="py-lineno">78</tt>  <tt class="py-line"><tt class="py-docstring">        credentials (Union[</tt> </tt>
+<a name="L79"></a><tt class="py-lineno">79</tt>  <tt class="py-line"><tt class="py-docstring">            google.auth.credentials.Credentials,</tt> </tt>
+<a name="L80"></a><tt class="py-lineno">80</tt>  <tt class="py-line"><tt class="py-docstring">            oauth2client.client.Credentials]): The credentials to use.</tt> </tt>
+<a name="L81"></a><tt class="py-lineno">81</tt>  <tt class="py-line"><tt class="py-docstring"></tt> </tt>
+<a name="L82"></a><tt class="py-lineno">82</tt>  <tt class="py-line"><tt class="py-docstring">    Returns:</tt> </tt>
+<a name="L83"></a><tt class="py-lineno">83</tt>  <tt class="py-line"><tt class="py-docstring">        Union[httplib2.Http, google_auth_httplib2.AuthorizedHttp]: An</tt> </tt>
+<a name="L84"></a><tt class="py-lineno">84</tt>  <tt class="py-line"><tt class="py-docstring">            authorized http client.</tt> </tt>
+<a name="L85"></a><tt class="py-lineno">85</tt>  <tt class="py-line"><tt class="py-docstring">    """</tt> </tt>
+<a name="L86"></a><tt class="py-lineno">86</tt>  <tt class="py-line">    <tt class="py-keyword">if</tt> <tt id="link-7" class="py-name"><a title="googleapiclient._auth.HAS_GOOGLE_AUTH" class="py-name" href="#" onclick="return doclink('link-7', 'HAS_GOOGLE_AUTH', 'link-0');">HAS_GOOGLE_AUTH</a></tt> <tt class="py-keyword">and</tt> <tt class="py-name">isinstance</tt><tt class="py-op">(</tt> </tt>
+<a name="L87"></a><tt class="py-lineno">87</tt>  <tt class="py-line">            <tt class="py-name">credentials</tt><tt class="py-op">,</tt> <tt class="py-name">google</tt><tt class="py-op">.</tt><tt class="py-name">auth</tt><tt class="py-op">.</tt><tt class="py-name">credentials</tt><tt class="py-op">.</tt><tt class="py-name">Credentials</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
+<a name="L88"></a><tt class="py-lineno">88</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">google_auth_httplib2</tt><tt class="py-op">.</tt><tt class="py-name">AuthorizedHttp</tt><tt class="py-op">(</tt><tt class="py-name">credentials</tt><tt class="py-op">)</tt> </tt>
+<a name="L89"></a><tt class="py-lineno">89</tt>  <tt class="py-line">    <tt class="py-keyword">else</tt><tt class="py-op">:</tt> </tt>
+<a name="L90"></a><tt class="py-lineno">90</tt>  <tt class="py-line">        <tt class="py-keyword">return</tt> <tt class="py-name">credentials</tt><tt class="py-op">.</tt><tt class="py-name">authorize</tt><tt class="py-op">(</tt><tt class="py-name">httplib2</tt><tt class="py-op">.</tt><tt class="py-name">Http</tt><tt class="py-op">(</tt><tt class="py-op">)</tt><tt class="py-op">)</tt> </tt>
+</div><a name="L91"></a><tt class="py-lineno">91</tt>  <tt class="py-line"> </tt><script type="text/javascript">
+<!--
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