Fix to refactor for wav files
Minor ringbuffer changes.

Changed the get implementation, modified exception to take params
Added MIDI drum machine
New reverb based on Moorer reverberator
Added MIDI drum machine
Merge branch 'master' of github.com:thenyeguy/ClickTrack
Moved timing callback to speaker

Also stripped PORTAUDIO from BUFFER_SIZE name
Changed sample rate back down from previous commit

...
Merge branch 'master' into android-master

Conflicts:
	Makefile
	main/subtractive_synth_main.cpp
	src/io_elements.cpp
	src/io_elements.h
	src/midi_wrapper.cpp
	src/midi_wrapper.h
	src/portaudio_wrapper.cpp
	src/portaudio_wrapper.h
	test/test_reverb.cpp

Merged in modified timing code