Add berkeley-alpha theme

Screenshots:

| ![home-loggedout](https://cloud.githubusercontent.com/assets/1570168/5238765/528c162c-787b-11e4-9ce7-24fe70ed84b2.png) |
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| ![contact-loggedin](https://cloud.githubusercontent.com/assets/1570168/5238766/59b362ca-787b-11e4-894a-b8d0c0d19ccb.png) |