Add the ability to construct an Interest argument without
using the Interest keyword, so instead of:
om:lookup(Interest { type = "session" })
we can now write:
om:lookup { type = "session" }
... and also remove lookup_filtered from ObjectManager
The component loader is a more generic and extensible mechanism
of loading components; modules are one type of component...
The idea is to make scripts and config files also be components,
loaded by plugins that inherit WpComponentLoader
