Added commands scanpos and scanstep that sets preferred position and scan step respectively. Renamed cmd stepsize to scanstep.
Added commands scanpos and scanstep that sets preferred position and
scan step respectively. Renamed cmd stepsize to scanstep.

nla/yaz,dcrossleyau/yaz,nla/yaz,dcrossleyau/yaz,dcrossleyau/yaz,nla/yaz,nla/yaz