this is a bit more than just mypy support, this is a starting point for
brining the python libraries up to a similar level of functionality as
the Go libraries. In the Go space we have started to partition off
semantic domains that provide a nice modeling interface for users in
that domain and take care of mapping down into xir and back up. This is
the general idea with this library, with a focus on experimenter needs.
The Go libraries are more focused on resrouce providers.

Signed-off-by: Ryan Goodfellow <rgoodfel@isi.edu>