created local_user_study script.  This randomizes the steps and does the 
recordings.
added many-channel recording support in local_user_study.
local_user_study now cycles through a list of playback devices (different speakers).
modified local_user_study script and switched to 96khz
updated user study experiment script to allow different sample rates on the different sound devices.
added local study parameter script
final user study configuration
updates while ziyang was down.  Note that trials.dat had the test user's 
entries removed.
calculated p_vals in Matlab
udpated code function names and descriptions.
added to processing script the analysis actually described in USENIX09 
submission.
generalized analysis code.
generalized function for processing local user study recordings (so it 
is now possible to do different types of analyses on this data without 
rewriting the parsing code)
added code for correlation calculation (between first and second half of 
recordings), but the correlation formula seems to be incorrect (since 
the absolute values are not less than 1).
updated correlation coefficient code, but still gives values slightly 
greater that 1.
added fine-grained echo energy data
added learning parameter study script
am now calculatin statistics for each vector rather than one 
set of statistics accross all vectors.