Echo JS 0.11.0

On simple 2d canvas demo it's a large (~10 FPS) boost when you avoid calling `parseFloat` for every fill (I got such result drawing sth like 1000 arcs on 700x300 size canvas in randomize directions).

This looks like as someone had not watches this presentation on micro benchmarking yet: http://www.youtube.com/watch?v=65-RbBwZQdU