Fix for a bad class cast exception
test case for issue #445
Bug fix for sprite frames not being purged properly. Thanks @lordnedox
defensive code to prevent NRE
Merge branch 'master' of https://github.com/Cocos2DXNA/cocos2d-xna
added some comments and centralized the hash key construction for textures.
updated monogame with fixes for texture saving.
updated with latest monogame
Added access to the local z min/max of a node's children and then removed a second iteration of children in the menu.
Move declarations around to prevent spurious NRE during game init if the game is minimized at startup.
updated with latest monogame and infiniteflight changes
fixes to make the rotation work properly for ios 8.0
added some OS version output to the configuration.
Fix compile error
compile error fix
merge fix
build fixing for bad refs to the OSVersion object in the environment.
Merge branch 'master' of http://github.com/Cocos2DXNA/cocos2d-xna

Conflicts:
	cocos2d/CCConfiguration.cs
Fix for issue #447 - fixed the preprocessing of focused touches that was causing duplicate touches to be sent to handlers.
Fix for broken RunForever scheduled updates that would not run forever.