allow active record objects to be passed to operations

Currently you have to pass the id, then on the server side find the id. It would be good to do this automatically.

However that is easy.. the harder part is to keep the abstraction whole, you need to pass the current record changes to the server, so that the current client context can be resestablished on the server.

Currently for example the hypermodel save and fetch operations, gathers up all the related records to the record being saved/fetched, and sends not only the record to being saved (or vector to record to be fetched) but also any of the related records that have changed values.

This is used so that on the server the context of the fetch/save is reproduced on the server.

What we should do is create a mixin that can be added to Operations, that adds this behavior, and then use it to implement fetch and save, and then allow it be used by other application defined operations.

This would help make implementation of #213 straight forward