Prevent exponential notation (e.g. 1.0e-19) reaching CSS

[axelpale]

Safari and Opera do not yet support scientific number notation in CSS. In JS, when very small numbers are converted to string, we usually end up with something like "-8.43858185037473e-19".

These unsupported number strings can reach this._transforms within Move.js, corrupting the resulting transformation.

For example, in my project, the following transformation string did not work in Safari 9.0.2:

"matrix(-8.43858185037473e-19, -0.003906249999999999, 0.003906249999999999, -8.43858185037473e-19, -1.3819999999999997 ,0.5000000000000001)"

There is some discussion how to prevent this.