More work on serial interface
LedFlash.java:
-extra debugging statements added

Coordinator.java:
-application layer protocol changed:
  -added one byte to the front of the header to hold transmission type and protocol version
  -transmission type is bit 7, 0 is text transfer, 1 is binary
  -bit 6 reserved
  -bit 5 is always 1 (this will keep the header from ever having the same value as the terminating LF byte)
  -bits 0-4 are protocol version (0 0000) for this initial version
-sendCommand() now implimented (not tested). Creates a byte[] of the message to transmmit
-uses new SerialConnection interface

SerialConnection.java:
-new code based off the stock arduino example
-attempts to auto connect, does not use serial port given in command line (yet)
-added write(byte[]) to send data on the serial line (not tested).