Driver class for a Sparkfun SerLCD display.
Connect RX pin of the LCD Display to PIN5 on the imp.
Author: Jason Snell
// Configure the UART port
local port0 = hardware.uart57
port0.configure(9600, 8, PARITY_NONE, 1, NO_CTSRTS);
// Boot!
server.log("booting!");
// Allocate and start a screen
screen <- SerLCD(port0);
screen.clear_screen();
screen.start();
screen.set0("Hello"); // Write the first line
screen.set1("World"); // Write the second line