Initial check-in of the "recollection" contest entry.

The code is currently just a skeleton, with a basic menu system to select the
game mode and the difficulty.  Also performed some makefile cleanup; fuses and
F_CPU are now set.
Implemented code to generate the winning move list.  Also implemented the
preview mode which allows the player to see the switch-light mapping.
Completed rudimentary gameplay
Implemented indication of wrong guess, and basic scoring
Implemented difficulty levels, and added end game animations
Fixed bug in scoring
Re-arranged some code to save space
Added random number seeding
Merge branch 'recollection'