Use LatLonBoundingBox if no BoundingBox tags in a WMS service
Merge branch 'feature/CDB-514' into import-dialog

* feature/CDB-514:
  Use LatLonBoundingBox if no BoundingBox tags in a WMS service
Merge branch 'import-dialog' of github.com:CartoDB/cartodb into import-dialog

* 'import-dialog' of github.com:CartoDB/cartodb:
  Update layer querys in map
Improves wms layer selection