hyper-animations v0.0.1

This is a fork of (https://github.com/web-animations/web-animations-js). Eventually this might provide CSS property handlers for (https://github.com/kevindoughty/hyperact).

To implement additive compositing, property handlers need to be converted to objects that each implement the following functions:

• add
• subtract
• zero
• interpolate
• input
• output
• unspecified (optional)