Basic geojson representation
Expose main ID in geojson
cleanup
Also expose type in GeoJSON feed
Expose type_name and type
Merge pull request #43 from ox-it/geojson

GeoJSON representation
Merge branch 'index-shapes' into oxpoints-improvements

* index-shapes:
  Expose type_name and type
  Also expose type in GeoJSON feed
  cleanup
  Expose main ID in geojson
  Basic geojson representation