MS Visual upgrade.
Merge remote-tracking branch 'origin/GUIFeature' into HEAD

Conflicts:
	opengl.superbible.6th.example.codes/build/vs2010/startup_Debug/vc120.idb
	opengl.superbible.6th.example.codes/build/vs2010/win32raw_Debug/vc120.idb
	opengl.superbible.6th.example.codes/lib/sb6_d32.lib
	opengl.superbible.6th.example.codes/sb6.sdf
Show-Hide Menu button.
Fix in Show-Hide Menu button.