Release wf-uicomponents 0.6.0.

 PR's included in this release:

https://github.com/WebFilings/wf-uicomponents/pull/21
https://github.com/WebFilings/wf-uicomponents/pull/18
https://github.com/WebFilings/wf-uicomponents/pull/20
https://github.com/WebFilings/wf-uicomponents/pull/22

How To +10/QA
-------------

```bash
# skip the following steps if you've already initialized the project
$ git clone git@github.com:WebFilings/wf-uicomponents.git
$ cd wf-uicomponents

# do not skip these!
$ git fetch && git checkout HY-537
$ ./init.sh
$ grunt qa
```

@trentgrover-wf @jasonwelch-wf @shanesizer-wf @jasonjohnson-wf @timmccall-wf @lancefisher-wf @nathanevans-wf @robbecker-wf @mikethiesen-wf @patkujawa-wf