Add support for entity operation annotations

[toby-griffiths]

New version of PR #144, properly rebased on master,…

I've added the possibility to add the following to a type definition to support operation annotations…

types:
    Person:
        operations:
            item:
                <method>:
                    method: '<method>' # or…
                    router_name: '<route_name>'
                # ...
            collection:
                <method>:
                    method: '<method>' # or…
                    router_name: '<route_name>'
                # ...

This will probably want documenting too, but not got time to do this right now. I've made a reminder to do this if someone else doesn;t get to it before I do.

[dunglas]

Thanks Toby!

[toby-griffiths]

Happy to help