Adding SurfaceFormat enumeration
Changing constructor signature of GraphicsDevice to take a CanvasElement. Moved WebGLRenderingContext querying there.
Adding TextureAddressMode class.
Adding TextureAddressMode tests.
Adding SurfaceFormat tests.
Adding in TextureAddressMode and anisotropy to SamplerState.
Fixing default min/max filter values.
Moving GraphicsDeviceCapabilities to its own file. Cleaning up the GraphicsDeviceCapabilities. Adding query for max anisotropy level.
Moving GraphicsDeviceCapabilities to its own file. Cleaning up the GraphicsDeviceCapabilities. Adding query for max anisotropy level.
Adding additional extension checks.
Reorganizing the .toString for GraphicsDeviceCapabilities.
Adding TextureMinFilter/TextureMagFilter enumerations.
Adding tests for TextureMagFilter and TextureMinFilter
Adding additional comments to SamplerState
Adding additional comments to SamplerState
Redoing changes to SamplerState after merge erased some
Adding additional constructors for SamplerState.
More cleanups

Signed-off-by: John McCutchan <john@johnmccutchan.com>
Adding SamplerState tests.
Adding SamplerState tests