fix werebeast detection, unithealth typo

- changes the werebeast detection to use the syndrome instead of the
unit's curse name (which often is empty for werebeasts)
- fix harmless typo in unithealth
add new belief column type, fix trait conflicts

- adds a new type of column for beliefs
- fixes an issue where some conflicting traits weren't highlighted
correctly
Merge branch 'develop' into DF2014