update to latest HEAD
    
    - Again, lots of groups UI changes/fixes thanks to Adam.
    - Add "groups mark blacklist" command to get out of the upgrade problem.
    - Tell users how to mark install/remove groups without packages.
    - Show install groups as well as upgrading groups in transaction output.
    - Fix mark-convert-whitelist, and add mark-convert-blacklist (default).
    - Fix typo with simple groups compile of environment with only options.
    - Pass the ievgrp to groups for new installed envs., so they belong. BZ 1043231.
    - Don't confuse "group info" output by giving data for optional when it's off.