started loudness
extraction of loudness coefficients
adds spectral centroid feature
implemented perceptual spread
changed buffersize, changed number of bark bands
created readme

this is the first time I’m writing markdown so might be tricky
fixed fenced code blocks and features header
fixed list at Setup (maybe?)
-list elements from setup, +js highlight
added authors, minor tweaks
fixed description
fixed typo in code
fixed typo in setup code
Merge pull request #38 from hughrawlinson/readme

Readme
major improvements

loudness now outputs band-specific and total
perceptual spread is correct according to GP2004
Merge branch 'perceptual-spread' into loudness

Conflicts:
	main.js
Merge pull request #10 from hughrawlinson/spectralCentroid

adds spectral centroid feature, fixes #36
added perceptual sharpness
fixes merge conflict
Merge pull request #40 from hughrawlinson/loudness

Loudness