[[ Bug 11654 ]] Add a small delay after removing the snapshot window to ensure the display buffers have been updated.
Updated version number to 6.6.0-gm-1.
Updated submodule refs to point to 6.6 release branches.
[[ Bug 11946 ]] Use simulator preference to preserve device type in iOS simulator 7.1
Merge branch 'release-6.6.0' into develop

Conflicts:
	engine/src/mac-snapshot.mm
	version