update years in copyright
version bump
begin adding dvk support
Start adding code for DVK
Further DVK code
bump Doxfile version
More DVK code...
Add basic support for OTRSP (Open Two Radio Switching Protocol)
devices. Tested with SO2RDUINO.

DVK code temporarily disabled.
Updates to otrsp
Fix ctrl-PgUp and ctrl-PgDn for second-radio cw speed change