Squashed '3rdparty/objective-git/' content from commit 8d0a5f8

git-subtree-dir: 3rdparty/objective-git
git-subtree-split: 8d0a5f870e1e24443686ec4cb7100cb6a6e7bb15
Merge commit '01e26e33f38de893fa5f5b05719eb6fec9e6a74e' as '3rdparty/objective-git'