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/Map.js

@@ -27,6 +27,9 @@ OpenLayers.Map.prototype = {
     // float
     maxResolution: .3515625, // degrees per pixel
 
+    /* projection */
+    projection: "EPSG:4326",
+
     // DOMElement: the div that our map lives in
     div: null,
 
@@ -113,6 +116,7 @@ OpenLayers.Map.prototype = {
     */    
     addLayer: function (layer, zIndex) {
         layer.map = this;
+        layer.projection = this.projection;
         layer.div.style.overflow = "";
         if (zIndex) {
             layer.div.style.zIndex = zIndex;