Animate SVG colors

These tests required a Polyfill fix to interpolate SVG colors
https://github.com/web-animations/web-animations-js/pull/604
Merge pull request #4 from ewilligers/color-fix

Animate SVG colors
Adding LICENSE file with Apache 2.0 contents.

Fixes Issue #8.
Merge pull request #9 from mithro/master

Adding LICENSE file with Apache 2.0 contents.
Alternating between two animations

Adding test with two animations that repeatedly run one after the other, with two
seconds delay between animations.
Merge pull request #6 from ewilligers/alternating

Alternating between two animations
Respond to click events

Adding test with animations that start when elements are clicked on.
Merge pull request #10 from ewilligers/click

Respond to click events
Illustrate the use of min and max

Adding test which shows how min and max constrain the duration of an animation.

(max=indefinite has no effect, as does min=0.)