[fluid-dev] Merged fluidsynth_event_queue branch into trunk

[josh]

I merged the fluidsynth_event_queue branch into trunk, following a  
commit of changes to the reverb and chorus code.  So the  
fluidsynth_event_queue branch should now be considered inactive and  
commits made only to trunk.

Reverb and chorus should now be thread safe and use the event queue  
and return event queue for setting and synchronizing parameters to the  
synth shadow variables (for use with fluid_synth_*_get functions).  I  
think tuning and cpu_load are probably the only remaining areas which  
still have multi-thread related issues, but the whole lot could use  
some more analysis to make sure.

We are getting closer to a thread safe FluidSynth :)  I'm tempted to  
throw in multi-core support, so we can see some more obvious benefits  
from this work.

Cheers!

Josh