moved modal for instructions and about us to modals.js to make code more readable
moved desert background image to images.js to make code more readable
refactored collide world bounds into one array
created overlap function to refactor code and moved it to board.js
Move player and pointer features were added to the features.js to clean up the code
fixed merge conflict, ok to pull
Merge pull request #100 from sidpatel13/final_refactoring

Final refactoring