3 * git revert, stash, rebase
5 * more low level index actions
6 - (with_index), checkout-index, read-tree, write-tree, update-ref
14 - prune, fsck, pack-refs, gc, count-objects, unpack-objects
16 * email/patch integration
17 - request-pull(email_address), git-am, git-apply
20 * compatible with git 1.4
24 * More Git::Status methods
27 * Speed up through pure ruby
29 * Speed up through C bindings to libgit-thin