chore: link to package documentation in README (#190)

Author: parthea

.repo-metadata.json

@@ -1,7 +1,7 @@
 {
     "name": "google-auth-httplib2",
     "name_pretty": "Google Auth httplib2",
-    "client_documentation": "",
+    "client_documentation": "https://googleapis.dev/python/google-auth-httplib2/latest",
     "issue_tracker": "https://github.com/googleapis/google-auth-library-python-httplib2/issues",
     "release_level": "preview",
     "language": "python",

README.rst

@@ -6,6 +6,13 @@
 
 The library was created to help clients migrate from `oauth2client <https://github.com/googleapis/oauth2client>`_ to `google-auth`_, however this library is no longer maintained. For any new usages please see provided transport layers by `google-auth`_ library.
 
+
+Documentation
+-------------
+
+`httplib2 Transport for Google Auth Documentation`_
+
+
 Introduction
 ------------
 |pypi|
@@ -21,6 +28,7 @@ This library provides an `httplib2`_ transport for `google-auth`_.
    :target: https://pypi.python.org/pypi/google-auth-httplib2
 
 .. _httplib2: https://github.com/httplib2/httplib2
+.. _httplib2 Transport for Google Auth Documentation: https://googleapis.dev/python/google-auth-httplib2/latest
 .. _google-auth: https://github.com/GoogleCloudPlatform/google-auth-library-python/