feat(minification): add support for minification using r.js

Add ngr.js a wrapper around r.js that expands ngDefines statements to
raw RequireJS / AngularJS modules.

- script can be invoked from web (see `test/ngr/optimize.html`) or node

Closes #2

Author: nikku

CHANGELOG

@@ -0,0 +1,11 @@
+# 1.1
+
+- update module load error messages
+- add ability to minify ngDefine scripts using ngr.js
+
+  ngr.js works as a wrapper around r.js (the requirejs optimizer).
+  It expands scripts that contain ngDefine to plain RequireJS / angular modules.
+
+# 1.0.0
+
+- initial release

Gruntfile.js

@@ -1,23 +1,23 @@
 module.exports = function(grunt) {
 
-  // Project configuration.
+  // project configuration
   grunt.initConfig({
     pkg: grunt.file.readJSON('package.json'),
-    uglify: {
-      options: {
-        banner: '/** ngDefine v1.0.0 | (c) Nico Rehwaldt <http://github.com/Nikku>, 2013 | license: MIT */\n'
-      },
-      build: {
-        src: 'src/ngDefine.js',
-        dest: 'build/ngDefine.min.js'
+    requirejs: {
+      compile: {
+        options: {
+          name : 'ngDefine',
+          baseUrl: './src',
+          paths: {
+            'angular': 'empty:'
+          },
+          out: 'build/ngDefine.min.js'
+        }
       }
     }
   });
 
-  // Load the plugin that provides the "uglify" task.
-  grunt.loadNpmTasks('grunt-contrib-uglify');
-
-  // Default task(s).
-  grunt.registerTask('default', ['uglify']);
+  grunt.loadNpmTasks('grunt-contrib-requirejs');
 
+  grunt.registerTask( 'default', [ 'requirejs' ]);
 };