Multicast frame sender and multicast command receiver optional beside standard tcp ports.
Removed multicast support from gveejay (obsolete), Added VIMS 023/022 and /out/mcaststart ,
/out/mcaststop to start/stop multicast frame sender. Change --port to --portoffset, Added -O5 for
silent output (no visual), Updated MAN page, minor documentation updates in doc/
git-svn-id: svn://code.dyne.org/veejay/trunk@308 eb8d1916-c9e9-0310-b8de-cf0c9472ead5