Autogen docs: handle more javadoc tags

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)