jsdoc does not deduce type of property from returns doc

[kring]

Take a look at the Viewer documentation:
http://cesiumjs.org/Cesium/Build/Documentation/Viewer.html?classFilter=Viewer&show=js

The animation property has a handy link to the Animation documentation but the centralBody property does not have a link to the CentralBody documentation. That's because the animation property attempts to document the property type like this:

 * @type {Animation}

And the centralBody property does it like this:

 * @returns {CentralBody} The primary central body.

Only the approach used by animation actually makes the type show up in the documentation.