Changed about screen

box is smaller, larger font, added drop shadow, centered OK button
Merge branch 'master' of github.com:serg-srri-umass/TP-data-games
Fixed tape measure drag issue #206 and added glow on mouseovers.
Merge branch 'MikeSalyh-TP-data-games/master'
Ship Odyssey update credits with "at SRRI.", build v1.0
Chainsaw new background to levels screen, new levels+tape measure glow color.