Region map indexing

This supports indexed regions to allow all the ABS boundaries except for mesh blocks (which they don't publish public data for as far as I can tell).

* The index of the region is determined via ogr2ogr and added to the shape.
* The shape list is read via the wfs getPropertyValue request.
* This list is used cross index the id from the csv file.
* We can now support regions sets of up to 64k
* There are the 10 'most common' regions on a new geoserver instance now.  We can add more as necessary, but I wanted to reduce the test cases until more of region mapping work is in.