r22748: add png and gif encoders, how to use them with mencoder is another question
r22749: split sonic into sonic/sonicls and wma into wmav1/wmav2
r22750: add rest of lavc encoders to list (vcr1, cljr, jpegls, ffvhuff, msmpeg4v1)
r22751: gsm requires libgsm so remove it
r22752: aiff isnt there as well, TEST FIRST, THEN DOCUMENT COMPN!
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@24640 b3059339-0415-0410-9bf9-f77b7e298cf2