Work on fft, beat onset detection

[darrenmothersele]

Placeholder issue for discussion about fft/beat onset detection.
Want to either improve the quality of the BEAT, HIHAT and SNARE globals, or add a BEAT global that more accurately represents the BPM of the music.
Could possibly take this from OSC or MIDI input?
Last night at Dorkbot spoke to Dan Stowell who created this library: http://onsetsds.sourceforge.net/