Spherical mercator example now makes use of this, displaying coordinates
in lon/lat instead of meters, and permalink/argparser now work in lon/lat
as well. this functionality will make using SphericalMercator easier for
a number of applications.
r=tschaub (Closes#1036)
git-svn-id: http://svn.openlayers.org/trunk/openlayers@5519 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf