implement .headers [on/off], .show [tables/triggers/etc]; clean up exiting; fix autocompletion for functions
implement .headers [on/off], .show [tables/triggers/etc]; clean up exiting; fix autocompletion for functions

fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary