fix(gruntfile): grunt tasks should run if no local config exists

Author: DaftMonk

app/templates/Gruntfile.js

@@ -1,6 +1,12 @@
 'use strict';
 
 module.exports = function (grunt) {
+  var localConfig;
+  try {
+    localConfig = require('./server/config/local.env');
+  } catch(e) {
+    localConfig = {};
+  }
 
   // Load grunt tasks automatically, when needed
   require('jit-grunt')(grunt, {
@@ -471,7 +477,7 @@ module.exports = function (grunt) {
       prod: {
         NODE_ENV: 'production'
       },
-      all: require('./server/config/local.env')
+      all: localConfig
     },<% if(filters.jade) { %>
 
     // Compiles Jade to html