Setting up CSD maintenance branch of bretthoerner/dropwizard-scala 0.6.2-1

We're now maintaining our own fork of dropwizard-scala since Coda Hale is no longer supporting the library.  Brett Hoerner has picked it up, and our fork adds a few CSD tweaks to his.

This PR is on a maintenance branch from Brett's current release: 0.6.2-1 (based on dropwizard 0.6.2).  By bumping jackson.version up to 2.2.2 (which we've been using for awhile throughout our stack), we can build a Scala 2.9.3 version of dropwizard-scala and eliminate our current need to special case a 2.9.2 version.

Other than that, this PR is all about setting up a Maven build.  I think I've included everything that we need in the pom, and nothing that we don't; but please give it a look.