Release v1.6.0 (#324)

* Update version and changelog for v1.6.0
* Update docs
diff --git a/docs/dyn/androidpublisher_v2.edits.apks.html b/docs/dyn/androidpublisher_v2.edits.apks.html
index 636762a..2fd99f0 100644
--- a/docs/dyn/androidpublisher_v2.edits.apks.html
+++ b/docs/dyn/androidpublisher_v2.edits.apks.html
@@ -81,7 +81,7 @@
   <code><a href="#list">list(packageName, editId)</a></code></p>
 <p class="firstline">A description of how to use this function</p>
 <p class="toc_element">
-  <code><a href="#upload">upload(packageName, editId, media_body=None)</a></code></p>
+  <code><a href="#upload">upload(packageName, editId, media_body=None, media_mime_type=None)</a></code></p>
 <p class="firstline">A description of how to use this function</p>
 <h3>Method Details</h3>
 <div class="method">
@@ -186,13 +186,14 @@
 </div>
 
 <div class="method">
-    <code class="details" id="upload">upload(packageName, editId, media_body=None)</code>
+    <code class="details" id="upload">upload(packageName, editId, media_body=None, media_mime_type=None)</code>
   <pre>A description of how to use this function
 
 Args:
   packageName: string, Unique identifier for the Android app that is being updated; for example, "com.spiffygame". (required)
   editId: string, Unique identifier for this edit. (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: