Feature/alia client

This PR depends on https://github.com/clojurewerkz/cassaforte/pull/5 for the tests to succeed (because of the collection type bug). 

This replaces the internal client with alia, leaving the original api intact, 100% backward compatibility (with regards to the cql/query api). 

That was easier than I thought. Next we probably need to clean things up a bit and work on proper root aliasing.