Added Number of Passengers to XMLWriter, added HeatPumpPassengerCompartments to writer

...Implementation/ComponentWriter/XMLBusAuxiliariesWriter.cs

...il/XML/Implementation/ComponentWriter/XMLVehicleWriter.cs

Vecto3GUI2020Test/ViewModelTests/LoadAndSaveVehicleData.cs

...H-PrimaryBus_SmartPS_HeavyUrban_P33SD_LowLoading_sim.vmod

...rimaryBus_SmartPS_HeavyUrban_P33SD_ReferenceLoad_sim.vmod

...VEH-PrimaryBus_SmartPS_Suburban_P33SD_LowLoading_sim.vmod

...-PrimaryBus_SmartPS_Suburban_P33SD_ReferenceLoad_sim.vmod

....0/VEH-PrimaryBus_SmartPS_Urban_P33SD_LowLoading_sim.vmod

...VEH-PrimaryBus_SmartPS_Urban_P33SD_ReferenceLoad_sim.vmod

...0/VEH-PrimaryBus_nonSmart_ATP_Coach_P32DD_LowLoading.json

...H-PrimaryBus_nonSmart_ATP_Coach_P32DD_LowLoading_sim.vmod

...EH-PrimaryBus_nonSmart_ATP_Coach_P32DD_ReferenceLoad.json

...rimaryBus_nonSmart_ATP_Coach_P32DD_ReferenceLoad_sim.vmod

...0/VEH-PrimaryBus_nonSmart_ATP_Coach_P32SD_LowLoading.json

...H-PrimaryBus_nonSmart_ATP_Coach_P32SD_LowLoading_sim.vmod

...EH-PrimaryBus_nonSmart_ATP_Coach_P32SD_ReferenceLoad.json

...rimaryBus_nonSmart_ATP_Coach_P32SD_ReferenceLoad_sim.vmod

...-PrimaryBus_nonSmart_ATP_HeavyUrban_P31DD_LowLoading.json

...maryBus_nonSmart_ATP_HeavyUrban_P31DD_LowLoading_sim.vmod

...imaryBus_nonSmart_ATP_HeavyUrban_P31DD_ReferenceLoad.json