fixed grunt dev so pushstate routes now work ( 404 -> index.html)

front-ui/Gruntfile.js

@@ -23,7 +23,16 @@ module.exports = function(grunt) {
             server: {
                 options: {
                     port: 3001,
-                    base: 'build'
+                    base: 'build',
+                    middleware: function(connect, options) {
+                        return [
+                            function(req, res) {
+                                var filename = 'build/' + req.url;
+                                if ((filename === 'build//') || !grunt.file.exists(filename)) filename = 'build/index.html';
+                                res.end(grunt.file.read(filename));
+                            }
+                        ];
+                    },
                 }
             }
         },
@@ -58,9 +67,12 @@ module.exports = function(grunt) {
                     },
                     force: true
                 },
-        files: [
-        {expand: true, flatten: true, src: ['build/ribica.bundle.js'], dest: 'build/'}
-        ]
+                files: [{
+                    expand: true,
+                    flatten: true,
+                    src: ['build/ribica.bundle.js'],
+                    dest: 'build/'
+                }]
             }
         },
         concat: {