* Partial voice implementation on audio renderer
* Implemented audren resampler (based on original impl)
* Fix BiquadFilter struct
* Pause audio playback on last stream buffer
* Split audren/audout files into separate folders, some minor cleanup
* Use AudioRendererParameter on GetWorkBufferSize aswell
* Bump audren version to REV4, name a few things, increase sample buffer size
* Remove useless new lines
* Call OpenGL functions directly, remove the pfifo thread, some refactoring
* Fix PerformanceStatistics calculating the wrong host fps, remove wait event on PFIFO as this wasn't exactly was causing the freezes (may replace with an exception later)
* Organized the Gpu folder a bit more, renamed a few things, address PR feedback
* Make PerformanceStatistics thread safe
* Remove unused constant
* Use unlimited update rate for better pref
