Updates to Operator class methods.
Initial attempt at using threading for fetching stations.
Updates to Station class.
Removing unused signals.
Attempt at creating a BaeListModel.
Re-arranged ordering of classes.
Pass station instance through to DepatureListModel, rather than list of depatures.
Removed controller - we can now handle depature list station change using a property.
Removed station property from departurePage - we now access this through ``departure_list`` station property.
Initial attempt at using threading for fetching departures.
Harmattan busy indicators for station/departure list pages. Added title alias back for harmattan DepartureListPage.
Clear out departures when setting station, to allow refresh functionality.
Use Silica ViewPlaceholder for loading and empty messages.
Version bump for 0.5 release.