fix(sample): prevent direct URL access to a day disabled in the datep…

…icker

Redirection from `booking.day` to `booking` if the date has no reservation.

Closes: #17

sample/controllers/booking_day.js

@@ -1,7 +1,11 @@
 angular.module('ncy-sample')
-  .controller('BookingDayCtrl', function($scope, $rootScope, $stateParams, rooms) {
+  .controller('BookingDayCtrl', function($scope, $rootScope, $state, $stateParams, rooms) {
     $rootScope.reservationDate = new Date($stateParams.year, $stateParams.month - 1, $stateParams.day);
 
+    if(!$scope.between($rootScope.reservationDate).length) {
+        $state.go('^');
+    }
+
     $scope.getRoom = function(id) {
         return _.findWhere(rooms, {roomId: parseInt(id)});
     }