New Geospatial Packages for Zope

As part of my work on migrating Pleiades to Plone 3, I'm distilling Zope packages from the original old-style Plone products. The zgeo.geographer introduces the conventional GIS data model of geometries, features, and collections (ala GeoJSON) to Zope and describes an interface for annotating objects with geographic location metadata. The zgeo.spatialindex provides a container-local R-Tree spatial index for geographically annotated objects, enabling fast spatial bounding box searches.