Performance improvements, added flickering cursor light.
Fixed non-circular light. Do not show hidden tiles.
Merge branch 'master' of git://github.com/JapaMala/dfhack

Conflicts:
	plugins/rendermax/renderer_light.cpp
Merge branch 'master' of git://github.com/JapaMala/dfhack
Update water a bit.
Torches for statues, candles on the tables.
Fixed unload/disable crash. Added glowing plants.
fix for map_block lights, fix for gem window color, dimmed the plant lights.
Added transparency to ice walls
Merge branch 'master' of https://github.com/warmist/dfhack

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

Conflicts:
	plugins/rendermax/renderer_light.cpp
Small fixes
Fixed skylight
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.