ktweb: add script for geocoding agenda item documents
db: add simple model for agenda item geometry
ktweb: add script for importing geometries into db
api: return geometries from db instead of hard-coded empty list
api: make /issue/search return all Point geometries if bbox is given as a param

This will be fixed to support the bbox value once we have GIS-compatible models.
ktweb: revert commit 555df0dadf8d19c5b7ad629d4576f8fd9b1c296e

Geometry data is obtained using an external geocoder tool.
Add support for draft resolution content types
ktweb: fix invalid column reference
ktweb: add missing imports
ktweb: fix proposal parsing