Add support for the @module sdoc tag

Following JSDoc as a guide, we need to add support for an @module tag. The syntax would be:

/**

 * @module {dir1/dir2/myModuleName}

 */

This will require us to:

1. Add support for @module and its parameters to the SDoc parser
2. Add a module element to the SDoc model
3. Possibly store a reference of the module name to the document defining it in the JS index