Create a properties service to operate on properties

[NickDraper]

The main jobs of the service will be:
- To create the properties and assign default based on a single line call (this will be in the init of each class that uses properties)
- To validate each property in a class (requested just before exec) and report failures by exceptions or events
- to provide a pretty string output of the options if required.

[NickDraper]

This issue was originally trac ticket 55