Issue #31: rename Service to Application to represent dw7 terminology.
Issue #31: Update project to dropwizard 0.7.1
Issue #31: Update codebase to dropwizard 0.7.1
Issue #31: Update tests to work with dropwizard 0.7.1
Issue #31: Fix jackson deprecation warnings.
Remove unnecessary import of a class in the same package.
Issue #31: Update maven plugins to latest version and add default implementation entries in the resulting jar.