Add animation properties, functions, values

properties: animation-fill-mode
functions: cubic-bezier, steps
values: alternate-reverse, alternate, reverse, backwards, forwards, ease, ease-in-out, ease-in, ease-out, infinite, paused, running, start, end, step-start, step-end

![image](https://cloud.githubusercontent.com/assets/1042267/4565179/90d20eb4-4f1d-11e4-907d-b227a02e947d.png)
![image](https://cloud.githubusercontent.com/assets/1042267/4565116/0bab928c-4f1d-11e4-9267-89f9d214d264.png)