Responses to Api methods. Implemented HttpResponse processors.

Removed getters and setters from immutable pojos, fields are public.

Basic tests for Api Methods. Will need additional complexity.

Simple mocks for valid requests.

Simple integration core tests. Json serialization tests.

In SBT Plugin: implemented parseDSL, generateSources, upgradeDatabase for test projects,
generating library part of unmanaged project and its database upgrade
under command upgradeScalaServer(Unmanaged) - will need namechange.
This is tested, but is still in flux.