Update polymer.js to 0.3.1
Adding anima

Description: With Anima it's easy to animate over a hundred objects at
a time. Each item can have it's mass and viscosity to emulate reallife
objects!
Source: https://github.com/lvivski/anima
License: MIT
Author: Yehor Lvivski (https://github.com/lvivski)
Updated packages via auto-update.js
Merge pull request #3337 from JGallardo/master

Adding anima
Merge pull request #3336 from amussey/polymer.js-0.3.1

Update polymer.js to 0.3.1
Updated tabcomplete
Merge pull request #3338 from erming/master

Updated tabcomplete
Updated packages via auto-update.js
Updated packages via auto-update.js
Updated packages via auto-update.js
Updated packages via auto-update.js
Updated packages via auto-update.js
Updated packages via auto-update.js
Updated packages via auto-update.js
Updated packages via auto-update.js