Added thumbs system

This PR adds support to Nerdz Black to the new anonymous Nerdz vote system.
Every user is able to give a +1/-1 vote to any profile/project post with a simple, unintrusive but elegant solution completely integrated with Nerdz Black.

![thumbs](https://f.cloud.github.com/assets/424549/2489254/302143ee-b159-11e3-8731-10377c476124.png)

Testing has been done on Windows/Linux (IE/FF/Chrome), but please check locally before putting this into production.