Ignore RubyMotion build files

These files are created when you vendor the ObjectiveGit Xcode project
within a RubyMotion app
Merge pull request #137 from isaac/gitignore

Ignore RubyMotion build files
it's good to free your shit
Merge pull request #139 from libgit2/fix-remote-leak

Fix remote leak
make it easy to diff between the wd and HEAD
Merge pull request #140 from libgit2/diff-additions

Make it easy to diff between the WD and HEAD
added -calculateAhead:behind:relativeTo:error:
Merge pull request #141 from libgit2/ahead

Added -calculateAhead:behind:relativeTo:error:
fixed ahead/behind
ignore the fixtures content
less lulzy tests
Merge remote-tracking branch 'origin/master' into ahead
newline lololo
Merge pull request #142 from libgit2/ahead

Fix ahead/behind
Add in templates for some new date extensions.
Stub the API for the new extensions to NSDate.
Implement the extensions.
Update time usage in GTCommit.
Update time usage in GTSignature.
Add a test for NSDate creation with a git_time.