Added custom Membership get_instance function for create pupa Memberships
Adds person_id onto membership if not already present
Gets/creates org object and adds org id to membership if not already present
Adds district id to pseudo-id post kwargs to facilitate pupa post resolution
Creates and yields person's membership in top-level org
Creates and yields person's membership in party
Add helper to server as the get_organizations callable on pupa Jurisdictions
Added generate_orgs helper that can be consumed by pupa Jurisdiction.get_organizations methods
Remove cruft copied from Memberships adapter
Added docstring to generate_orgs helper class
Enables `pupatypes` to be set at the class level or passed as __init__ args.
Provides an interface for subclasses to fudge the PupaGenerator's descriptor behaviour when used as a helper class, i.e., generate_orgs.
Make PupaGenerator get the pupa jxn through an overriable method.
Parse legistar identifiers and add them to the data.