hooks and gitolite

Gitolite uses the update hook for all repos. In addition, it uses the post-update hook for the gitolite-admin repo.

If you want to add your own hook, it's easy as long as it's not the 'update' hook. Just add it to $HOME/.gitolite/hooks/common and run gitolite setup.

The rest is between you and 'man githooks' :-)