How can we document extensions?

[justincy]

Two problems:

1. Get the extensions of core data types to appear.
2. Mark when something is an extension and which spec it belongs to.

[justincy]

If we can, it'd be nice to separate classes into namespaces based on core, rs, atom, records. I tried once but adding namespaces causes classes to be listed with {namespace}. as a prefix in the classes dropdown, such as core.Address. I don't like that; it prevent you from finding classes alphabetically. We would have to fork the template to use name instead of longname.

[justincy]

We are seeing extensions of core data types in the docs but we're not seeing methods of new data types from extensions in the docs. See DisplayProperties for an example; it's missing all getters and setters. In Field we see that it's properly picking up inherited methods.