Crash Fixes

* Fixed crash with monk class mobs and barehanded damage skill checks.
* Fixed crash with mob tracking. Track mobs probably don’t work yet, but at least we won’t have crashes because of it.
* Fix for spell learning when players advance levels. This may or may not have caused crashes (was a little unclear from the logs). This means that psionicists and clerics and such should auto-learn spells as they level.