Logger

@drsnyder 
Integration with WikiaLogger from https://github.com/Wikia/clojure-commons. Note that I'm purposely not specifying our internal repo in project.clj, since that lowers the value of making this repo open source in my mind. Though we should probably specify ```:repositories ^:replace [.....]``` in our profiles.clj
We can probably remove this from here since it's in commons.