added detection of and cleanup after application crashes.
if the media_addon_server crashes, it will be restarted.
removed preleminary volume control functions.
removed unneeded media_server functions.
changed application registration to use port based messaging.
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2027 a95241bf-73f2-0310-859d-f6bbb57e9c96