Update RemoteInt.h

Replaced:
"#include <WProgram.h>"
With:
#if defined(ARDUINO) && ARDUINO >= 100
#include <Arduino.h>
#else
#include <WProgram.h>
#endif

/*So that it can work with current and past versions of Arduino. Taken from Ken Shriff's original RemoteInt.h . Seems like you stuck with the NECIRrcv Library implementation of this*/