Basic Model Serializers

[klondikemarlen]

Part of https://github.com/elthran/UDK/issues/14

Keep serializer models and add extra code to make it easier.

• Add an ability to return different views from a serializer
• Add a building serializer.
• Add county serializer.
• Add kingdom serializer.

[klondikemarlen]

I'm going to merge now and make a fixup PR (to keep the diff lower).