gismu data now in js file rather than xml

This means that we no longer need the xmlhttp object, nor any actual
web-server.  The complete data can be served from a local file
(included js script) rather than a call to get and parse the XML.  This
was done using a new perl script:  convert_csv_to_js.pl, updated from
the original perl script which translated csv to XML.  This _may_
actually load faster as well.