Removed/Renamed DMX related Sketches

The previous sketch "SerialDMXToRFTransmitter"  has been renamed
HardwareSerialHackSerialDMXToRFTransmitter.  The new DMX to RF code is
in DMXSerialInputToRFOutput.ino.  The new code does not require the
hardware serial hack.
Moved Modified DMX libarary to shared location for future use