Updated the new level screen

Each level is now represented by two overlapping logs of the appropriate thickness.
Merge branch 'rmmccann-data-games/master'
Ship Odyssey: Saving Loading partially implemented. Current version cannot properly hook into DG. All other aspects working.
Merge branch 'seg-srri-umass-tp-data-games/master'
Ship Odyssey: Mission "Treasure or Not" reverted to fixed sample size, as per Cliff's request on Dec. 2nd