Possible Improvements: Namespaces and Geo tagging

• Use "geo" tagging for station location.
  Basic Geo Vocabulary has signifcant and growing usage.

  Original
  <location>Boston, Logan International Airport, MA</location> <station_id>KBOS</station_id> <latitude>42.38</latitude> <longitude>-71.03</longitude>
  Improved
  <current_observation version="1.0" xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos"> <!-- snippet --> <location station_id="KBOS" geo:lat="42.38" geo:long="-71.03"> Boston, Logan International Airport, MA </location>
  <current_observation version="1.0" xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos"> <!-- snippet --> <location> <station_id>KBOS</station_id> <geo:lat>42.38</geo:lat> <geo:long>-71.03</geo:long> <station_name>Boston, Logan International Airport, MA</station_name> </location>