#66 fluidsynth support

[Stas Sergeev]

Would be nice to add.
I already created the branch for this.
The following tickets are related:
https://sourceforge.net/apps/trac/fluidsynth/ticket/109
https://sourceforge.net/apps/trac/fluidsynth/ticket/110

Either hack around those, or wait...

[Stas Sergeev]

Hacked around the missing APIs.

One more ticket to track:
http://sourceforge.net/apps/trac/fluidsynth/ticket/111

TODO for myself:

• revisit the sequencer code of adlib and fluidsynth
  and (re)write it properly.
• move them to a separate threads
• implement for them some replacement of
  pcm_write_samples() and try to remove
  pcm_write_samples() completely as it looks
  like a poorly designed API hacked up exclusively
  for dspio.c.

[Stas Sergeev]

Implemented all TODOs except threading.

Ticket 111 is resolved.

New ticket added:
https://sourceforge.net/apps/trac/fluidsynth/ticket/113