Add support for ArcIMS/ArcXML to OpenLayers.

Thanks for the killer effort from David Zwarg from Avencia in building this, 
and for Tim Schaub from OpenGeo for his excellent review. r=me,tschaub
(Closes #213)


git-svn-id: http://svn.openlayers.org/trunk/openlayers@9249 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

tests/list-tests.html

@@ -45,6 +45,8 @@
     <li>Filter/Logical.html</li>
     <li>Filter/Spatial.html</li>
     <li>Format.html</li>
+    <li>Format/ArcXML.html</li>
+    <li>Format/ArcXML/Features.html</li>
     <li>Format/GeoJSON.html</li>
     <li>Format/GeoRSS.html</li>
     <li>Format/GML.html</li>
@@ -103,6 +105,7 @@
     <li>Icon.html</li>
     <li>Lang.html</li>
     <li>Layer.html</li>
+    <li>Layer/ArcIMS.html</li> 
     <li>Layer/ArcGIS93Rest.html</li>
     <li>Layer/EventPane.html</li>
     <li>Layer/FixedZoomLevels.html</li>