Tried to implement some phase modulation.  It appears to work but I am
unable to recover the phase and make sense of the results.  Also,
messing with the phase has strange effects on audible tones.  I read
about "beating" which seems to be our problem.
comment for reading
Merge remote-tracking branch 'ed/master'

Conflicts:
	src/net/ednovak/covert_talk/main.java
merge ed/master