JSON-RPC binding improvements

I would like to see the following improvements made to the JSON-RPC binding:

• Support for security (this will require exploratory work to understand what SCA security policies make sense to implement)

• Business Exception reporting, business exceptions raised by a service should be transported to the client through JSON and reported to the client as proper Javascript business exceptions

• Better runtime exception reporting, runtime exceptions occurring as part of a JSON-RPC interaction should be properly reported to the Javascript client.

• Complete data binding support, a set of test cases should be written to make sure that the POJO and JAXB patterns supported in Java components have a proper mapping to JSON and that the application developer can easily understand the corresponding representation of these objects in Javascript.