Arduino-serial: C code to talk to Arduino

Simple program for testing communication to an arduino or any other uC on serial
http://todbot.com/blog/2006/12/06/arduino-serial-c-code-to-talk-to-arduino/
clean up trailing whitespace
disable the ICRNL flag

ICRNL is ON by default on OpenWrt Ծ_Ծ, disable it
default baudrate 115200
check and report errors on write and read
b[1] really? Ծ_Ծ
separate buffers for read and write
note about quick compile