remove unused define constants
added defines XNA and MONOGAME
remove unused ccConfig.cs
Merge pull request #292 from mono/master

Accelerometer Fix and code comments.
remove unused DefineConstants
fixed reload assets
change implementation CCTexture2D.InitWithFile
fixed Reinit()
fixed ConvertSurfaceFormat()
Merge branch 'master' of https://github.com/Cocos2DXNA/cocos2d-xna
compile error fix
remove disposed assets from CCContentManager
clean code
initialize matrix
CCTexture2D.InitWithString support scaling
Registration of SpriteFonts, for using in ScaleContent
Test support ContentScaleFactor
sample using CCSpriteFontCache.RegisterFont
added HD content to Android project
CCLabel support ContentScaleFactor
temporary removed exception in CCParticleSystem
sorting font size in CCSpriteFontCache
Optimizations from Denis Minchuk and from the VS analyzer. Unraveling use of operator overloads in key solver methods.