SelectFeature control can now select across multiple vector

layers when passed an array of layers instead of a single layer with 
the constructor. This changeset also introduces a new layer type, 
Layer.Vector.RootContainer, which will be set as the topmost layer by 
the SelectFeature control and collect the svg/vml/canvas roots of 
multiple vector layers. r=crschmidt (closes #1666)


git-svn-id: http://svn.openlayers.org/trunk/openlayers@9116 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

tests/list-tests.html

@@ -115,6 +115,7 @@
     <li>Layer/TileCache.html</li>
     <li>Layer/TMS.html</li>
     <li>Layer/Vector.html</li>
+    <li>Layer/Vector/RootContainer.html</li>
     <li>Layer/WFS.html</li>
     <li>Layer/WMS.html</li>
     <li>Layer/WrapDateLine.html</li>