relying more on the adapter.page object to store appConfig and routes

For the sake of performance, and in preparation for adopting a more `express`-like approach, which is a less defensive approach btw, we now:

 * compute `appConfig` and `routes` once per request (by default) instead of computing them per mojit instance from within the addons.
 * deprecate `ac.staticAppConfig` in favor of `adapter.page.staticAppConfig` to easy the GC process by having less big objects hanging around.