stop polluting the global namespace with the model code on the front end

lib/init/build.js

@@ -11,7 +11,7 @@ exports.init = function (app, callback) {
     file = modelDir[i].replace('app/models', '').replace('/', '');
     if (file) {
       content = fs.readFileSync(modelDir[i], 'utf8');
-      files.push(content);
+      files.push("(function(){\n" + content + "}());");
     }
   }
   built = files.join('\n\n');