Add an option to store and display rev-parsed refs.
Add an option to store and display rev-parsed refs.

paulproteus/livegrep,wfxiang08/livegrep,lekkas/livegrep,wfxiang08/livegrep,paulproteus/livegrep,lekkas/livegrep,lekkas/livegrep,wfxiang08/livegrep,paulproteus/livegrep,paulproteus/livegrep,lekkas/livegrep,paulproteus/livegrep,wfxiang08/livegrep,paulproteus/livegrep,lekkas/livegrep,lekkas/livegrep,wfxiang08/livegrep,wfxiang08/livegrep