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
Merge remote-tracking branch 'upstream/master' into farmesh