Geocoder CA geocoder implementation. Requires the GeoKit::Geocoders::GEOCODER_CA variable to contain true or false based upon whether authentication is to occur. Conforms to the interface set by the Geocoder class.

Returns a response like: <?xml version="1.0" encoding="UTF-8" ?> <geodata>

  <latt>49.243086</latt>
  <longt>-123.153684</longt>

</geodata>