Add branchtags function with cache - cache stores tipmost node and rev and node,label pairs - if cache is out of date, scan new changesets - write new cache out after scan

#!/bin/sh

hg
hg -q
hg help
hg -q help
hg add -h
hg add --skjdfks
hg help diff
hg help status
hg -q help status
hg help foo
hg skjdfks

exit 0