#160 add types and interfaces of modbus master in ciaaModbus.h
#160 remove public interfaces
#160 implement modbus master open
#160 create blinking_modbus_master
#113 improve authors and modification history
#160 add function masterTask
#160 improve name modbus event, MODBUSME -> MODBUSE
#160 fix error, compile modbus master if > 0
#160 add retry count and timeout