Dynamic Orcid::ApplicationController inheritence

Mirroring Devise's behavior, I'm allowing the parent class for the
Orcid Application Controller to be configured.
Adding explicit `rake db:migrate`
Removing namespace isolation from Orcid

So this can play better with Sufia, I'm removing the isolated
namespace.
Merge branch 'master' of github.com:jeremyf/orcid

* 'master' of github.com:jeremyf/orcid:
  Add info on installing Qt