- add a cd_shared.c inspired by darkplaces, which implements the CDAudio interface and will either play the ogg music or call the hardware CD code
- set default sound speed to 44100 Hz. this will be necessary to make music sound decent. (unfortunately the resampling code sucks, i think, so the 11025 hz sound effects sound bad when resampled to 44100, but that should be easy to fix.)