Introduce Blob.IsBinary
Provide access to basic username/password auth for clone
Remove ThreadAffinity from git_remote_set_autotag
Add test repository with merge conflicts
Add IndexContainsUnmergedEntriesException to bind EUNMERGED exception
Bind git_graph_ahead_behind native method

Replace current implementation of Branch.AheadBy and Branch.BehindBy with git_graph_ahead_behind call
Merge with origin/vNext