Switching to Google Drive API.
Supporting old parameter format.
Fixing some bugs.
Fixing unit test.
Suppressing warning.
Bringing back File#document_feed_url.
Merging master.
Providing default client ID / client secret for saved_session.
Putting some methods back.
Implementing paging.
Using OAuth in README example.
Adding some method documents.
Reimplementing AclEntry.new with Hash object.
Updating documents.
Removing unused files.
Supporting showdeleted parameter.
Adding document.
Updating v1 implementation.
Updating .gitignore.
Switching to Google Spreadsheet API V3.
Constructing Worksheet object with worksheet feed entry.
Adding Worksheet#human_url.
Adding Worksheet#export_as_string and Worksheet#export_as_file.
Release it as pre release.
Fix error in example code.