A significant update of the client functionality.

* updated to use v0.3 of the discovery API
* updated to use httpadapter 1.0.0
* added OAuth 2 support to the command line tool
* renamed some switches in the command line tool
* added additional configuration capabilities

git-svn-id: https://google-api-ruby-client.googlecode.com/svn/trunk@128 c1d61fac-ed7f-fcc1-18f7-ff78120a04ef

README

@@ -44,7 +44,7 @@ APIs.
   client.authorization.fetch_token_credential!(:verifier => '12345')
 
   # Discover available methods
-  method_names = client.discovered_service('buzz').to_h.keys
+  method_names = client.discovered_api('buzz').to_h.keys
 
   # Make an API call
   response = client.execute(