Disabled restart on read/write error
Device mode GPIB bus receive should work
Device mode GPIB talking should work...hopefully
Small fix for device mode GPIB listen
Added mode checks for ++ cmds
Changed return format for ++ver

This way it matches up with what is expected for the KE5FX GPIB toolkit
Compiled last commit
Device mode implemented

Initial implementation of device mode. Works fairly well but will require testing with other brand controllers. With this, ++status now also works.
Merge branch 'feature-devicemode' into feature-prologixCMD