Stashing initial changes for new interface

This commit starts exploring a greatly simplified faceted browsing
interface for OGP.
Adds a basic Solr ORM

This commit introduces a limited mechanism for defining a layer
declaratively. The underlying Solr access is abstracted away.
Removing unused dependencies
Replaces old UI

This is a complete rewrite of the UI. The goal was to simplify the
user experience. Much of the functionality of the old interface has
been removed.
Adds FGDC XSL transform
Removing old XSL file