Merge postal code areas in preprocessed bounds

This reduces the file size a bit but it should avoid massive fragmentation of areas in the quad tree splitted areas.

git-svn-id: http://svn.mkgmap.org.uk/mkgmap/trunk@2527 25d90789-57f7-4ee0-8453-03a3dfeeeb22
Skip admin_level=2 boundaries that cannot be found in the LocatorConfig.xml

This should avoid adding boundaries that do not enclose "real" countries.

git-svn-id: http://svn.mkgmap.org.uk/mkgmap/trunk@2528 25d90789-57f7-4ee0-8453-03a3dfeeeb22