MATLAB script for generating spectrograms

This script generates auditory spectrograms for all files in the TIMIT
corpus.  I uses (1) the readsph function from the Voicebox toolbox for
reading in TIMIT WAV (sphere) files, (2) the wav2aud function from the
NSL Toolbox to generate spectrograms, and (3) the getfiles function
from the Mathworks File Exchange to read in all WAV file names from the
TIMIT directory structure.
Generate downsampled SA1 and SI spectrograms

Load some TIMIT SA1 and SI spectrograms and downsamples them for use in
a CLA “sentence-spotting” task.
Build structure of TIMIT metadata

Script for building a structure of TIMIT metadata, and the resulting
structure in a .MAT file.  Useful for quickly letting a list of the
files that meet whatever criteria are desired (e.g., SI sentences
spoken by males).
Create README.md
Update README.md
Update README.md
Merge pull request #1 from dkleissa/master

adding speaker_id hack
Put spectrogram generating code in one directory.
added pitch detector nupic code.  based on hot gym example.