Serial class for Linux

• Linux serial communication using the termios API

Build using g++ with c++11

• Example: `g++ -std=c++11 serial.h serial.cpp client-code.cpp

Constructors:

• Serial()and Serial(speed_t baud, std::string port) assume canonical input mode.
  • Both delegate to Serial(speed_t baud, std::string port, bool canon)
• Serial(speed_t baud, std::string port, bool canon)
  • Client specifies baudrate port and input mode