#374 Barbarian: replace use magic item with punching
This is a separate ticket so that it doesn't block the cleanup patches if it inspires debate, which it might :)
This adds the Punching skill to barbarians, and removes Use Magic Item. The lack of Punching is probably an oversight stemming from the fact that they can't use basic_skills directly (because if they did they'd have Literacy and lack of that skill is one of the main things that differentiates them from the Warrior), so I expect adding that in to be fairly uncontroversial.
Removing UMI is done on the basis that their class description describes them as "deeply afraid" of magic, and being unable to use wands, magical powders, etc is in character with that and serves to further differentiate them from warriors (and encourage greater reliance on sheer force of arms). Note that they can still use potions, so emergency healing and recovering from death-induced stat loss is still possible.
Applied as revision 21395, many thanks :)