Adding strategy and protocol base classes for better vector behavior. This just sets the common API for strategy and protocol. In general, a vector layer can have many strategies. A setLayer method gets called on each of these layers. When a layer is added to a map, any strategies on that layer get activated. When the layer is destroyed, any strategies get destroyed (this could be changed to deactivate for symmetry). A vector layer may also have a protocol. A protocol is typically constructed with a format. The layer doesn't need to know about the format. The protocol doesn't need to know about the layer. Strategies coordinate feature management for a layer. Specific strategies and protocols to follow. r=crschmidt (closes #1646)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@7650 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

tests/list-tests.html

@@ -110,6 +110,7 @@
     <li>Popup/AnchoredBubble.html</li>
     <li>Popup/FramedCloud.html</li>
     <li>Projection.html</li>
+    <li>Protocol.html</li>
     <li>Renderer.html</li>
     <li>Renderer/Elements.html</li>
     <li>Renderer/SVG.html</li>
@@ -117,6 +118,7 @@
     <li>Request.html</li>
     <li>Request/XMLHttpRequest.html</li>
     <li>Rule.html</li>
+    <li>Strategy.html</li>
     <li>Style.html</li>
     <li>StyleMap.html</li>
     <li>Tile.html</li>