OpenLayers.Console.userError function. This allows for easy overriding of this
function for people who need to report errors at an application level (or
hiding these errors entirely), with the same default behavior as previous
releases. Patch from funky_c, r=me, (Closes#1651)
git-svn-id: http://svn.openlayers.org/trunk/openlayers@7675 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf