[WIP] Sub Feature: Basic Issue Overview

TODO:

- [x] Finish adding the basic information panel to the issue overview interface
- [x] Come up with a way of serializing a model instance to an object in the `DomainObjectArrayDecorator` (fixed as part of #156)
- [x] Complete the work in #159 on refactoring object serialization to use JMS serializer
- [x] Update styles for the basic issue screen (@stuartrayson)