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