WIP: First pass at a Clojure chapter for Taste of Riak (Welle)

[Welle](http://clojureriak.info/) seemed like the best choice for a Clojure client.

- [x] Have someone +1 the code
- [x] Have someone +1 the community-supported clients section on the Taste of Riak index
- [x] Fix styling issue on Taste of Riak index