Fix nearly all lint; update all copyright dates as appropriate.

I checked the copyright dates using this command:
for f in `grep -rl "Copyright 2013 Kevin" .`; do
    echo "$f"
    git log -n 1 --format='%cd %s' "$f"
done
A better version would filter the results to show only mismatches.
Use unserialize_exported_state to remove the WFM-specific kludge in demodulator construction.

(Said kludge was obsolete anyway.)
Allow plugins to specify CSS; use python styled names.
DerivedCell avoids unnecessary recomputation.
Add a test for Index responding to reshape.
Fix Index adding duplicates of the same object.

Unfortunately I couldn't think of a reasonably simple test for this.
(And Index is messy all around.)
Interpret results from gr-air-modes and store in an information object.
Add map plotting and other client bits for aircraft.