* Added an 'RDMatrix::RossNkScp' value to the 'RDMatrix::Type'
enumeration in 'lib/rdmatrix.cpp' and 'lib/rdmatrix.h'.
* Implemented a switcher driver for the Ross NK line of video
switchers via the SCP/A serial interface in 'ripcd/rossnkscp.cpp'
and 'riptcd/rossnkscp.h'.