.gitignore updates
 * Removing .ruby-version and .ruby-gemset from repo as they are in
   the .gitignore file already.
 * Adding IDE / Editor specific entries to the .gitignore for Sublime,
   TextMate, and RubyMine.
Merge pull request #266 from AmoebaConsulting/fix_gitignore

.gitignore updates
Merge branch 'master' into edge