Correct the reference now that ObjectiveGit externals have been moved.
Added "/usr/bin/git" to the searchLocations.

I use the git version that is shipped with Xcode, which resides in "/usr/bin/git". When trying to open a repository I got this error message:

Could not find a git binary version 1.6.0 or higher.
Please make sure there is a git binary in one of the following locations:

	/opt/local/bin/git
	/sw/bin/git
	/opt/git/bin/git
	/usr/local/bin/git
	/usr/local/git/bin/git
	/Users/bler/bin/git

I did not feel like moving my git binary, so I added my location to the list. Considering that my location is the default location for git on OS X I really think it should be in this list. I was surprised that it wasn't.
Use [at] class in headers, and #import in implementations.
Fix self initialzation.
Refactor so it doesn't walk the sidebar items twice.
Don't leak the dispatch queues and groups.
Generated header.
Fix warning.
Rename the DEPRECATED macro to GITX_DEPRECATED, and wrap it in a #define

So it can be temporarily hidden.
Reorder methods around.

The point is to make it clearer what's NSDocument and what's our stuff.
Fix more warnings.
Load submodules with ObjectiveGit.
Merge remote-tracking branch 'refs/remotes/tiennou/header-cleanup'

Conflicts:
	Classes/git/PBGitGrapher.mm
	Classes/git/PBGitRepository.m
	Classes/git/PBGitSHA.m
	GitX_Prefix.pch
Remove redundant string formatting
Merge pull request #281 from codiophile/master

Added "/usr/bin/git" to the searchLocations.
Update appcast script for python3
Latest objective-git
Latest objective-git: API changes

- [GTRepo lookupObjectByRevParse:error:] -> - [GTRepo lookUpObjectByRevParse:error:]
Sidestep error due to wrong class in the submodules collection

Remove PBGitSubmodule for now; just use GTSubmodule.
Merge remote-tracking branch 'refs/remotes/origin/master'