Prepare for BPM detection code
Ignore pyc files
Refactor, add window function
Add similarity matrix calculation
Add beat spectrum analyzer
Use autocorrelation for beat spectrum
RMS to sum beat spectrum -- thanks Abe!
Add some figures
Fix FFT symmetry
Beat finding works!
Noramlize beat spectrum
Ignore pyc files
Merge branch 'bpm-detect'

Conflicts:
	wav/music.wav