++libgit2 for ignore pattern fixes
Use git_libgit2_init for global initialization
Rename git_remote_lookup to git_remote_load
Remove git_remote_supported_url wrapper

See libgit2/libgit2#2644.
Pass current remote name into git_remote_rename
Remove config refreshing wrapper

See libgit2/libgit2#2638.
Merge pull request #423 from libgit2/bump-libgit2

Bump libgit2 to bring in gitignore fixes