merge: pull user messages out to hg.py
- add _update for shadowing in clone
- add _showstats helper
- remove update parameter defaults
- move stats message and merge help messages
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)