properties set directly in their creation options. By default, layers will
be "always on", with an overridable "alwaysInRange" parameter.
To maintain the old behavior, set:
OpenLayers.Layer.prototype.alwaysInRange = false;
r=euzuro
(Closes#987)
git-svn-id: http://svn.openlayers.org/trunk/openlayers@7863 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
