* Fix the bug on Windows where the KISS TNC cannot be used straight away.
  A work around is to use a program like UI-View. Check that you can read data
  Then use this module per usual.
* Implement methods to write to a KISS TNC.
* Implement methods to write AX.25 frames.
* Implement Frame Check Sequences (FCS) or CRCs if they are included in the
  frame that is sent to the computer. They aren't with the TNC-X.
