Move projection information storage to map. Layer/Grid.js sets the projection when it creates a tile url, and it's no longer in the default params of WMS.js.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@240 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer.js

@@ -11,6 +11,9 @@ OpenLayers.Layer.prototype = {
     // OpenLayers.Map
     map: null,
 
+    // str -- projection for use in WFS, WMS, etc.
+    projection: null,
+    
     /**
     * @param {str} name
     */