Autogen docs: handle more javadoc tags

[AlexDBlack]

For example:
````{@code new Object()} in javadoc should render to a markdown "" (markdown code) block.
And also ```new Object()```

Some other javadoc tags that would be nice to support:
@see
@inheritDoc (and pulling in javadoc from a superclass when an @Override is present and no javadoc is defined)