Moved SoundData and SoundFormat to OpenTK.Compatibility.
Moved AL and Alc classes to OpenTK.Audio.OpenAL and added the previous namespace to OpenTK.Compatibility.
Removed SoundData wrappers from AL class.
Updated samples to use the new API.
Added xml documentation for the ContextHandle.
Made the casts between ContextHandles and IntPtrs explicit.
Updated all ContextHandle consumers to reflect the explicit cast.
Added SoundReader class.
Added OpenTK.Math.Functions.NextPowerOfTwo
Fixed several AL functions, and added overloads to AL.BufferData.
Added OpenAL wave playback sample.