Added a convenience function (move()) to the cAudio source, making it easier to move a source and do velocity for doppler effects with a single call.
Internally, audio sources are now stored in an std::vector for better performance. This change also makes it so that it is no longer required for the user to name a source. The user can pass NULL to name to avoid naming it.
Some documentation fixes.
Added a stress test app, allowing users and developers test how well cAudio performs under pressure.