Public release

The overclocking and sample rates are higher than 48 KHz are removed from this version.
The µC clockrate is now auto adjust. This is gonna take a few seconds right after usb playback starts. It's been tested on Debian and should work for everybody who can build it or has the controller i prebuilt the hex for.
Added precompiled hex files for atxmega128a3u atxmega256a3u atxmega192a3u atxmega128a4u atxmega256a3bu atxmega128a1u MCUs.