preloading high-value entity metadata

[Cantor, Scott]

> If I follow this thread (I've been elsewhere) you need the
> 	persistentCacheManagerRef
> 	persistentCacheManagerDirectory
> 	persistentCacheKeyGeneratorRef
> 	initializeFromPersistentCacheInBackground
> 	initializationFromCachePredicateRef
> 	backgroundInitializationFromCacheDelay
> 
> attributes.  As per [1].  This gives you control of how, where, and what is
> cached and what and when is reloaded.

Yeah, that's it.

I don't like having the settings split across multiple pages for all the reasons noted, but I think the more important issue is just for the main page to provide explicit pointers and examples on how to configure the basic features (this being one).

-- Scott