now using shift operator
more documentation
you can now win the game!
added game won message
added basic image chooser
added necessary Firefox OS building blocks + UI WIP#1
difficulty settings
user interface WIP#2
game UI and image chooser UI done
changed file structure
removed unneeded files
additional pictures + UI fix
chooser scrolls to top when it should
scrolling fix again
drop shadows are more subtle
added game menu with restart and surrender
fixed puzzle shape + added better debuggability