fix for android to build on api16
more handy overrides for drawing rectangles.
latest monogame
Merge branch 'master' of http://github.com/Cocos2DXNA/cocos2d-xna
Proper handling of the BeginDraw shortcircuit when the graphics device is no longer valid.
on towards automating the ios nuget build.
changed to only use xamarin and not monodevelop
changed to only build for the mac
script updates to build the ios/macos nuget packages.
Merge pull request #454 from Cocos2DXNA/master

Merging this into stable to get a NuGet build