Use ListBox<ListBox<BusInfo>> to display favorite Buses in MainPage.xaml

DataService is replaced by Database
LongListSelect is replaced by ListBox
Json is replaced by IsolatedStorageSettings.ApplicationSettings["FavBusGroups"]
Json format is replaced by Database.ExportFavBusGroups()
Use PivotItem in AddBusStation.xaml with custom Pivot.Header Template
Remove BusTag
Replace StringVM with xaml: <Text="{Binding }">
Use PhoneApplicationService.Current.State["busInfo"] to passing object to Details page
Add AppLogger for LiveBusTile project
TODO:
Fix: LiveBusTile not updated
Use DataTemplateSelector to display different template for distinct ListBox Item.