Disallow OS text selection in atom buffers.
Disallow OS text selection in atom buffers.

liuderchi/atom,PKRoma/atom,atom/atom,PKRoma/atom,liuderchi/atom,stinsonga/atom,Mokolea/atom,liuderchi/atom,stinsonga/atom,brettle/atom,atom/atom,stinsonga/atom,brettle/atom,atom/atom,t9md/atom,brettle/atom,PKRoma/atom,t9md/atom,Mokolea/atom,t9md/atom,Mokolea/atom,liuderchi/atom,stinsonga/atom