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0.06  09/24/2003
	Scott Gifford contribed the following changes
  * query_postal_codes contained some errors:

    + It assumed that the space between single degrees of latitude and
      longitude are the same.  This only holds true at the equator;
      otherwise the distance between two degrees longitude is:

          cos($lat*PI/180)*LON_MILEAGE_CONSTANT

      This formula is probably well-known, but I got it from:

          http://www.malaysiagis.com/related_technologies/mapping/basics1b.cfm

      This corrected a bug where the cells searched would often miss
      areas that were a ways away from the site.

    + There were bugs when the search radius crossed the poles, the
      prime meridian, or the -180/180 longitude line.  All of these
      are now fixed in various ways (see the code).