Midi Kit: Made it possible for the user to use a soundfont different
from the one supplied by default.
Since the PM move, it was not possible anymore to use a different soundfont,
since the /boot/system/data folder became read only.
Now the user has to put the soundfont (or, better,  a symbolic link to it)
into /home/config/settings/synth.sf2
In the future we'll supply a preflet to select the soundfont.
Midi Kit: Actually look in /home/config/settings/synth/synth.sf2
Midi Kit: SoftSynth: Implement reverb (patch by Pete Goodeve)
Applied patch by Pete Goodeve which implements reverb in the soft synthesizer.
Fix spacing