-accelerometer input is now relative to the position of the device at
the time of the last fish spawn.
-Added a more detailed score display and reworked scoring system.  A
correct answer is now worth 100 points plus a bonus for time remaining. 
The score is shown as treasure chests (500 points) and money bags (100
points).  The score and money sprites will tick up for 500ms after a
correct answer.
Added images for treasure and money bags.