Integrate new fluidsynth library

For now, this allows playing back a MIDI file using a soundfont (which
sounds a lot nicer than the standard midi instrument sounds)
Remove call to startSynth() that was removed from the FluidDroid
library. Also, update the song generator jar
A few minor fixes for layout performance, and removing a few extra
comments/blank lines.
Drop 1 of UI changes:
-Add a layout for when the app is in landscape mode. This will better
accommodate changes in the future (and just looks better on smaller
devices (hopefully)
-Removed the Save option and added to options menu (it was no longer
visible in the new landscape mode on smaller devices anyway).