Merge branch 'master' of https://github.com/warmist/dfhack

Conflicts:
	plugins/rendermax/renderer_light.cpp
Still broken. Needs boundary checking.
Merge branch 'master' of https://github.com/warmist/dfhack

Conflicts:
	plugins/rendermax/renderer_light.cpp
Merge branch 'master' of https://github.com/warmist/dfhack
Added some fast checking for obstacles around lights, resulting in a huge speedup outside.
Merge branch 'master' of git://github.com/JapaMala/dfhack into rendermax