added support to load files in Node.js

lib/Template.js

@@ -689,7 +689,24 @@ try {
       return f.readWhole();
     }
   }
-} catch (e) {}
+} catch (e) {
+    // try Node.js
+    try {
+        var fs = require("fs");
+        if (typeof fs != "undefined" && "readFileSync" in fs) {
+            Template.Context.prototype.load_file = function load_file (file) { 
+                var f;
+                try {
+                    return fs.readFileSync(file);
+                }
+                catch (e) {
+                    throw new Template.Exception("file", Template.escapeString(file) + ": not found");
+                }
+            };
+        }
+    }
+    catch (e) {}
+}
 
 Template.Parser = function (config) {
   this.end_tag   = this.default_end_tag;