Merge pull request #18 from Batophobia/master

Bug Fixes
Remove dead code
More place names
Spec out some building functions
Add building ticks
Fix building ticks, make villagers eat
Use proper functions for adding resources from buildings
More building tick functions
ZMOBIES
Adjust zmobie odds based on buildings
Fix school upgrades, nicer styles
Update to CT button
Some balancing of villagers/buildings
Continuous smelting
Re-fix

Re-fixed the arrow key movement.  main.map_visible is now set when
exploration tab is clicked.