Miscellaneous bug fixes

It is my pleasure to report that the infamous Bug 25549, that caused Trolls
(and everyone else) to lose some hit points when a wound changed severity,
is now presumed dead. Please file a bug report if it should reappear.

Other news from the front:
- You can no longer use "me" as a label for someone else
- Beornings in Bear shape, when using "train all", will no longer try to
  refresh their spells (which would automatically fail due to lack of mana)