Made animframe_polyfill.js JSHint compliant

Reformatted a bunch to make JSHint happy.
Merge pull request #115 from iirelu/jshint-compliance

Made animframe_polyfill.js JSHint compliant
Merge branch 'gh-pages' of github.com:styfun/2048 into gh-pages
office prank :)
office prank :)