modified:   .gitignore
Modbus client have two contrunctors:
1) For create an instance of the serial por comunication as member.
2) For create an instance of the tcp por comunication as member.
This two posible values prvide a pilimorphics vehavior.

	new file:   Code/modbus_interface.cc
	new file:   Code/modbus_interface.h
	new file:   Code/modbus_tcp.cc
	new file:   Code/modbus_tcp.h
	new file:   README.md