* NEW: Channel.Distance is a new property that defines the channel
distance, between 0 (near) and 255 (far).
* NEW: Channel.Angle is a new property that defines the channel direction,
0° being the front, 90° the right, 180° behind and 270° the left.
* NEW: Channel.Reverse is a new boolean property that reverses the channel
stereo.
* NEW: Music.SoundFontPath is a new property to tell SDL the directories
where the MIDI sound font files are stored.
git-svn-id: svn://localhost/gambas/trunk@6780 867c0c6c-44f3-4631-809d-bfa615b0a4ec
c9d87bf8b9