1. Allow loading audio directly from a sample buffer
2. SetVolumeDirect that takes a 0 -> 1 scale similar to OpenAL's AL_GAIN.
3. Fix OpenAL threading bugs with logging by caching the sawmill.
* Removed the Interfaces folder.
* All objects inside the GameObjects subfolders are now in the GameObjects namespace.
* Added a Resharper DotSettings file to mark the GameObjects subfolders as not providing namespaces.
* Simplified Robust.client.Graphics namespace.
* Automated remove redundant using statements.
