Licenses: update MIT, formatting adjustments

Merge pull request #5 from evanfitzgerald/patch-1

create license

Guard from falsy x or y in add_collisions, fixes #3

Add Codekit 3 config

Add .DS_Store to ignored files

Update index.html

Update domain name

Add a temporary domain name

Add custom domain name

Updates:

Add MIT and Creative Commons licenses

Remove 'windowed mode' message from settings dropdown

Add favicon

Add full screen mode for FF and Webkit borswers, fix bad .ogg file (train scene)