v0.7.3: Fix printFrameHex() for debugging; new and updated examples

The SensorModbusMaster library is designed to use an Arduino as a Modbus master to communicate with a sensor/slave via the Modbus RTU communication protocol.

Changed

• Update readWriteRegister.ino example to work again with the AltSoftSerial library.

Added

• Add a new getSetAddress.ino example #30

Fixed

• Fix printFrameHex() that was broken with v0.7.0 #29

Full Changelog: v0.7.1...v0.7.3