fix json4s rendering of heterogenous lists
either function for case analysis on Validation
cleanup, factor http response from series rendering
final implicit class ValidatorOps extends AnyVal
use Config not env, log http requests in HttpRetriever
simple way to choose parser without using List[Option[DateTime]]
bump to http4s v0.4.0
bump http4s to v0.4.1
Updated to scalaz stream 0.6
Either is a duplicate of fold