am-depth/README.md

Assign depths based on Google's Material Design

# Usage
Material Design's depth is created by using pseudoelements. To give en element
depth, just:

```
<div am-depth="0">Zero Depth</div>
<div am-depth="1">One Depth</div>
<div am-depth="2">Two Depth</div>
<div am-depth="3">Three Depth</div>
<div am-depth="4">Four Depth</div>
<div am-depth="5">Five Depth</div>
```