Added basic comment descriptions to the scripts and to some of the source files. There's still much to be done, but it's a start.

scripts/plot.py

@@ -5,6 +5,10 @@ from amodem import common
 from amodem.config import Configuration
 import sys
 
+"""Script that exposes pylab's spectogram plotting
+capabilities to the command line. It implements this
+for amodem.config Configurations.
+"""
 
 def spectrogram(t, x, Fs, NFFT=256):
     ax1 = pylab.subplot(211)