extracted mel filterbank
implemented mel bands in frequency
renaming stuff, finding of each frequency
summing up every filterband, multiplying by the power spectrum andcalculating log of each value
cleaned up some for loops
calculating DCT to output the MFCC
fixed merge conflicts
Merge pull request #49 from hughrawlinson/MFCC

Implemented MFCC. We need to check if the output values make sense.