Revision 34C

Some good fixes here, folks

 * FIXED: job interrupts weren't set to fire at all in 34 experimentals; combat should work way better now
 * added Mine building and Mineshaft module
 * balance: made higher-class beds more expensive
 * FIXED: "Feel Madness" incorrectly made people "Feel Happy"
 * FIXED: some mismatched character body/head textures
 * FIXED: save game issue crashing saving invalid assignments
 * FIXED: tree rendering on OS X
 * Added "# of active work crews" counter to top of screen
 * made artisans less interested in doing paperwork at night
 * removed "idle in chair" job so that there will be free chairs for people to eat in
 * FIXED: when you call a Naturalist via favour, you actually get a naturalist now.
 * Naturalists will form work crews (though labourers don't do anything in them yet)
 * Rewrote memory utility code to correctly update and set moods from memories without having half-crazed, volatile mood swings.
 * FIXED: rendering errors on particle systems
 * Right-clicking a stockpile filter will enable ONLY that filter.
 * Right-clicking a work crew filter will enable ONLY that filter.
 * Added debug messages to try and catch more save game issues
 * "make planks" now looks for closest log
 * FIXED: peat cube was a white cube