support for hierarchical module naming schemes

@geimer: this should fix the problem that's blocking you right now

I might need to figure out one more thing w.r.t. the devel module name before this really works for you, I'm looking into that...
a parsed easyconfig (i.e. an instance of `EasyConfig`) can be treated as a `dict`, i.e. `ec['name']` works as expected, etc.