Complete Support for API Versioning

[SteveIves]

We need to completely work through the scenarios for implementing API versioning in a service. We currently have partial support, with the ability to generate an API version number into the URL's of the service, but there is more to be addressed before we can demonstrate to developers how to go about implementing version 2, 3, and so on.

Acceptance criteria will include:

• The ability to generate a service, then make changes to the external API of the service, either in terms of the operations being exposed, or the data types being returned, and have both the old and new API's being surfaced and fully operational.
• WiKi documentation must be extended to document the process and provide examples.