Remove race possibilities from slip mode
rewrite race-protection
duhhhhh
Bools accessed from multiple threads should be atomic ints
Merge branch 'master' into slipmode_fix
Merge branch 'master' into slipmode_fix
rename deref to remove confusion with QAtomicInt::dref()
fix more load_atomic calls
Merge branch 'master' into slipmode_fix

Conflicts:
	src/engine/enginebuffer.cpp
deref->load_atomic
Merge pull request #326 from ywwg/slipmode_fix

Remove race possibilities from slip mode