Mixing custom registry with a local registry

[jtrunick]

Currently you cannot mix custom registry with local registry...

(merge mc/default-registry {::id int?
                    ::country string?}}

ikitommi: Currently, the local registry must be data, doesn’t accept IntoSchema instances. This both is a) unfortunate b) slows m/form a lot.

[ikitommi]

Yes, this should be changed.