Merge pull request #1 from raydelto/master

Minor memory handling enhancements

Removing debug printing

Using relative paths to avoid hardcoding absolute paths

Implemented the Sound utility class. Re-factor the entity management of expired elements.

Implemented timer wrapper.

Warping grid!

Added entry to dev log.

Added particle effects.

Implemented virtual joysticks and blackholes.

Merge branch 'master' of https://github.com/rroa/GeometryWars

Added enemies!

Added a reference to the font sprite.

Update devlog.md

Added the devlog to source control. Modified some classes for them to build with Emscripten.