Changes introduced in version 3.01

1. Bugfix: When switching to (or through) Morse mode with the AFC on, the
   receive and transmit frequencies changed continuously. Now fixed.

2. Previously, aborting a CQ call or a FileSend operation did not take
   place until the send buffer emptied. Now these operations no-longer feed
   through the send buffer and can therefore be aborted more quickly.

3. The MORSE mode is now on the alt-F6 key rather than in the F1 key
   sequence. The F1 key now simply toggles between BPSK and QPSK.  