trait notes, inversion, stress descriptions

- added the special notes back to traits indicating if a unit has
potential to fall into a mood
- marked some traits to be valued inversely, and added the appropriate
messages on tooltips, etc.
- added asterisks on the personality section of the dwarf details to
better indicate cultural conflicts, and inversely valued traits
- added general stress descriptions to the unit tooltip's emotion
section (haggard and drawn, utterly harrowed, etc.)
- fixed typos in the thoughts/goals/beliefs