Remove *.cpglog files.

These are log files about what CPS did after each run.  It does not append to
the log and it doesn't try to not overwrite an existing log.  All of that sort
of makes the log useless, so remove it from the git repo.
Update WH6DSN HT1250 codeplug, add button configuration description.

All of the amateur radio conventional personalities needed to be set to 25 khz
channel bandwidth, not 12.5 khz.  Add a plain text file describing the button
configuration on the HT1250.