Restructure folders

[alexanderdean]

Folder structure ported over doesn't make total sense now this tracker has its own repo. Should be restructured.

[alexanderdean]

e.g. makes more sense for js/src to be changed to src/js!

And can probably move build script into scripts.

[alexanderdean]

And add a /dist folder for writing the concatenated/compressed files to.

[alexanderdean]

Done in 0.13.0.