Release Notes:

• GW.py: Auto-detect the COM/serial port device name
  • The device argument is now optional!
• USB: Provide a serial-id string to the host
  • Identifier is unique to each Greaseweazle device
  • Allows disambiguation between multiple Greaseweazle devices
  • Recommended: Full flash from HEX file (embeds serial in bootloader)
• Ubuntu: Udev script now creates a /dev/greaseweazle symlink