Added a request for JDBC versions to the README.
Added a "Ports" section to the README.
Preparing v0.4.1.
Updating dependencies.
Renaming the 'named_parameters' test to the more accurate 'mixed_parameters'.
Updating to Expectations v2.

This removes support for Clojure 1.4.
Adding Clojure 1.7.0a1 to the supported builds.
Version bumps for dependencies.