Release v1.6.0 (#324)

* Update version and changelog for v1.6.0
* Update docs
diff --git a/docs/dyn/analytics_v3.management.uploads.html b/docs/dyn/analytics_v3.management.uploads.html
index 1b63ecc..79d1c8f 100644
--- a/docs/dyn/analytics_v3.management.uploads.html
+++ b/docs/dyn/analytics_v3.management.uploads.html
@@ -84,7 +84,7 @@
   <code><a href="#list">list(accountId, webPropertyId, customDataSourceId, max_results=None, start_index=None)</a></code></p>
 <p class="firstline">List uploads to which the user has access.</p>
 <p class="toc_element">
-  <code><a href="#uploadData">uploadData(accountId, webPropertyId, customDataSourceId, media_body=None)</a></code></p>
+  <code><a href="#uploadData">uploadData(accountId, webPropertyId, customDataSourceId, media_body=None, media_mime_type=None)</a></code></p>
 <p class="firstline">Upload data for a custom data source.</p>
 <h3>Method Details</h3>
 <div class="method">
@@ -169,7 +169,7 @@
 </div>
 
 <div class="method">
-    <code class="details" id="uploadData">uploadData(accountId, webPropertyId, customDataSourceId, media_body=None)</code>
+    <code class="details" id="uploadData">uploadData(accountId, webPropertyId, customDataSourceId, media_body=None, media_mime_type=None)</code>
   <pre>Upload data for a custom data source.
 
 Args:
@@ -177,6 +177,7 @@
   webPropertyId: string, Web property UA-string associated with the upload. (required)
   customDataSourceId: string, Custom data source Id to which the data being uploaded belongs. (required)
   media_body: string, The filename of the media request body, or an instance of a MediaUpload object.
+  media_mime_type: string, The MIME type of the media request body, or an instance of a MediaUpload object.
 
 Returns:
   An object of the form: