Car Wash: car

fix missing space in CWWorker
Car Wash: job acceptance
Car Wash: missing pragmas
Car Wash: car wash building
Car Wash: car washing
Car Wash: car name

fix randomWorker
Car Wash: fix log messages
Car Wash: refactoring
Car Wash: async
Car Wash: remove methods

carWashRooms dynamic accessor
Car Wash: fix "modulo bias"
Car Wash: background thread
Car Wash: car queue
Car Wash: service queue stub
Car Wash: service queue for booker and director
Car Wash: service queue
Car Wash: improvements
Car Wash: car queue and carwash builder
Car Wash: observer and observable stub
Car Wash: composition of observers