Merge pull request #1 from derekwright/master

Fill in the blanks version of World.hs
Merge pull request #3 from derekwright/master

Added Graphics puzzles
Merge pull request #4 from derekwright/master

Solution to first puzzle (World)
Merge pull request #5 from derekwright/master

Added rough version of parseWorld
Merge pull request #6 from derekwright/master

Updated parseWorld and added printWorld
Merge pull request #7 from derekwright/master

Added Engine puzzles
Merge pull request #8 from derekwright/master

Add Graphics, update World and Engine
Merge pull request #10 from derekwright/master

Working simulator
Merge pull request #11 from derekwright/master

Add samples