Add ngAnnotate task.

grunt-config/ngAnnotate.js

@@ -0,0 +1,12 @@
+'use strict';
+
+module.exports = {
+    dist: {
+      files: [{
+        expand: true,
+        cwd: '.tmp/concat/js',
+        src: '*.js',
+        dest: '.tmp/concat/js'
+      }]
+    }
+};