Add version to make Fx happy
Use let instead of var
let and for/of in animframe_polyfill
Use arrow functions to eliminate self=this idiom
switch to traceur
Remove requestAnimationFrame polyfill. It is not needed in Chrome or Firefox, and it seems to be causing problems with Traceur
Put all classes on the global object so that we don't have to explicitly export/import them, for now
Modify the text on the readme and index.html to indicate that this is an ES6 port, and that it is not the official version of 2048.
Convert constructor functions to ES6 class syntax.
Shorter objlit syntax
move cell and title into a smaller scope
Convert grid.eachCell to a generator
simplify tileMatchesAvailable using tiles() generator
Put back the requestAnimationFrame polyfill, making sure to use the native requestAnimationFrame() if available.