Implemented light and heavy snares.
Changed snare traps to snare kits.
Flu makes your head hotter, common cold makes your body colder
Common cold now make you more tired, which in turn lowers body temp
switch overmap to full 3d stack
shift out mongroups to z-level code, re-add bits that where disabled during switch over
slight speed up in world generation, and a popup because it takes so long
prefix is filename not directory
fixed segfault, sped up generation and maps
fix for merged change not having z-axis data
removed unknown function, something I broke during merge I think
fix notes display for z-level code
update to stop cycling layer data so much
Merge pull request #231 from tasetase/freq

Lowered spider/wolf ratio -> 3%spider, 3%wolf, 2%cougar/bear ~> 15% rabbit
TERMX/Y, VIEWX/Y are now global. More centering.
Updated changelog
Merge commit 'bc9b0f9' into dda-master

Conflicts:
	crafting.cpp
	itypedef.cpp
Merge commit 'cababa6' into dda-master

Conflicts:
	overmap.cpp
Spelling correction.
Add a category flag to mtypes.