Merge pull request #42 from Smashman/master

Change 16 to select plates and add stacked plate in order to stop bento * cheat (plate * now)
Levels!
Merge branch 'master' of github.com:flukeout/restaurant
New levels 
+ first-of-type
+ last-of-type
+ only-of-type
Fixed stuff i broke.
nth-of-type levels