Added loader.js

Reviewed by me.

Objective-J/CommonJS/objective-j/lib-js/objective-j/loader.js

@@ -0,0 +1,23 @@
+var objj = null;
+
+function ObjectiveJLoader() {
+    var loader = {};
+    var factories = {};
+    
+    loader.reload = function(topId, path) {
+        if (!objj) objj = require("objj/objj");
+        
+        //print("loading objective-j: " + topId + " (" + path + ")");
+        factories[topId] = objj.make_narwhal_factory(system.fs.read(path), path);
+    }
+    
+    loader.load = function(topId, path) {
+        if (!factories.hasOwnProperty(topId))
+            loader.reload(topId, path);
+        return factories[topId];
+    }
+    
+    return loader;
+};
+
+require.loader.loaders.unshift([".j", ObjectiveJLoader()]);

Objective-J/CommonJS/objective-j/package.json

@@ -2,9 +2,10 @@
     "name": "objective-j",
     "dependencies": ["narwhal", "jack", "browserjs"],
     "lib": "lib-js",
-    "author": "280 North, Inc. (http://280north.com/)",
-    "description": "Objective-J module",
+    "preload": ["objective-j/loader"],
+    "description": "Objective-J and Cappuccino module",
     "keywords": ["objective-j", "objj", "objective j", "cappuccino"],
+    "author": "280 North, Inc. (http://280north.com/)",
     "contributors": [
         "Francisco Tolmasky (http://tolmasky.com/)",
         "Ross Boucher (http://rossboucher.com/)",