Update gdata gem

Story: https://www.pivotaltracker.com/n/projects/1106466/stories/84862982

Updates the [gdata](http://rubygems.org/gems/gdata) gem to the newer stock version (1.1.2)

Patches the require (see gmail.rb) to not include the outdated jcode gem dependency.  This (please confirm) is the only change from our custom gem that is not in trunk at this point

cc @quirkey @GordonDiggs