Test fix linux pure?
fixed global votes being cleared when changing team between red<->blue
Cleaned up CL_SendPureChecksums, no longer need to do this special Yf -> cp stuff since code is available.
Moved changelog to CHANGELOG.txt, added developer notes to README.md
Batch of client serverbrowser fixes merged from ioq3.  MPlayer mostly removed.  Servercache still loads it for legacy files (for now).
Fix commit ae64e2795db7d5b7e54a5f0f7a520da1426aec3a