Added everything.
Added *.opensdf to .gitignore
Changed GetDynamic to IsDynamic
Added screen width/height to GraphicsDevice
Changed SpriteBatch constructor to take a GraphicsDevice
Changed Game's GraphicsDevice management
Updated sample game to reflect changes
Cleaned sample game's Draw method
Added usings to sample game.
Changed GetGraphicsDevice to const
Added resizing of SpriteBatch's vector
Updated Release configuration settings
Basic 2D texture added
SpriteBatch now can draw using Texture2Ds
Updated sample game to draw textures
Minor GraphicsDevice/VertexBuffer changes
Texture2D now has a TextureFormat member
Minor cosmetic changes
Fixed Vector2F/Vector3F const members initialization
Added Matrix4x4F class