Added Git packages for OS X 10.6–10.9
Moved Git binaries to a separate repo
Install will now download and install Git on Macs
Install recognizes Mavericks' "fake" /usr/bin/git
Don't be quite so quiet when installing.
Same git-recognition logic as install's
Install script unlinks its temp files.
Changed unlink() to rmdir() because I'm stupid
Merge branch 'feature/install_git' into develop