fix for non-64 bit build.
added fail when wp8 sdk is not found.
fixes for plural build steps in the same task that could mistakenly remove the prior build before the nuget is built.
added 32 bit support
Added a primtives test case that uses a render texture to render the primitives. See https://cocos2dxna.codeplex.com/discussions/452328
Merge remote-tracking branch 'upstream/master'