Various adjustments. I should commit more often ;).

Various adjustments.  I should commit more often ;).

Added # comments to tweakfile syntax.

Played around with adding a white-noise floor in the vibration fitting,
but the fits didn't look all that convincing.  Some of the white-noise
code is still in place, but I think it's currently disabled ;).

Fixed some typos in TEXT_VERBOSE output in vib_analyze.py