Docs should omit children of private modules

[hegemonic]

The output for JSDoc currently has some wonkiness related to module:jsdoc/runtime. The comment that includes the @module tag is also tagged @private, but some static methods are not tagged @private. As a result, those static methods show up on the index page, which pulls from all known doclets. We also generate a pretty-printed source file.

If a module is private, we should hide all of its descendants from the docs. Also, we should not generate a pretty-printed source file for the module.

We should check the behavior of namespaces and classes to make sure they don't have a similar issue.

[hegemonic]

Namespaces and classes have the same issue.

However, it may be tricky to solve this without a performance hit. I think we'd have to keep (and iterate over) a bunch of private doclets that we currently throw away.