notes:
-yes, there is beryl... it is too complex for the pre-freeze rush
-Mesa-6.5.2 is needed (not at build time, but to run). See pkgsrc-wip.
-the "Composite" extension needs to be anabled in the X server
-at least for intel, Option "XAANoOffscreenPixmaps" is needed, otherwise
some UIs look crippled
