feat(app): reload grunt server when gruntfile is updated

When a change occurs on gruntfile, reload the server

Author: eddiemonge

templates/common/Gruntfile.js

@@ -34,6 +34,9 @@ module.exports = function (grunt) {
         files: ['<%%= yeoman.app %>/styles/{,*/}*.css'],
         tasks: ['copy:styles', 'autoprefixer']
       },
+      gruntfile: {
+        files: ['Gruntfile.js']
+      },
       livereload: {
         options: {
           livereload: '<%%= connect.options.livereload %>'