Refactor and optimisations

Release 3.1.1

Merge pull request animate-css#154 from mrwillis21/rubberBand

Add “rubber band” animation.

Merge pull request animate-css#154 from mrwillis21/rubberBand

Add “rubber band” animation.

Merge branch 'v3'

Conflicts:
	bower.json

Add Slide animations to main and minified css files

Add Slide animations to main and minified css files

Add Slide animations

First tag, 2nd iteration: starting at 2.0