Document CMake options in README
Try not crash
Fix rendering glitches when far from the center of the map
Merge remote-tracking branch 'minetest/master'

Conflicts:
	README.txt
	src/camera.cpp
	src/game.cpp
	src/mapblock_mesh.cpp
	src/mapblock_mesh.h
Dont crash!
Replace pause and message menu by formspec ones
Merge remote-tracking branch 'minetest/master'

Conflicts:
	builtin/mainmenu.lua
	src/guiPauseMenu.cpp
Restore MF pause
yet another crash
Stop wasting time in abm - performance improvement

Unless I'm mistaken, the chunk of code I'm moving there is potentially
executed hundreds of times inside the loop to get the exact same result
every time
Merge remote-tracking branch 'minetest/master'

Conflicts:
	src/environment.cpp
fix wider_unknown_count
Merge remote-tracking branch 'proller/TextureInfo'
remove dupe sendDetachedInventories
Merge remote-tracking branch 'upstream/master' into gsmapper