added get/set_sound controls
stripped down initializing
changed play() again
outsourced xrun-handling
added some cases to get_space() as xrun-handling
added nonblock-mode
added mmap-mode
added subopts for mmap and noblock called mmap and noblock
could be accessed as -ao alsa9:noblock:mmap
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6634 b3059339-0415-0410-9bf9-f77b7e298cf2