* Add a 'style' property to the layer. * When a feature is added to a layer, either uses the style on the layer, or uses the default feature style. * Add test to Layer.Vector for this funcionality * Adds a preFeatureInsert hook to change a feature *before* drawing it. * Change openmnnd demo to include the use of preFeatureInsert and style attribute on layer. git-svn-id: http://svn.openlayers.org/trunk/openlayers@2949 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf