Moved target listen cmds to function "addressTarget"
Changed ++eot_char to return an int

This way it is consistent with the way you specify it
Added prologix ++llc cmd

This is the local lockout cmd that prevents the front panel of the currently addressed model from working
Added prologix ++loc cmd

This is GPIB cmd GTL for "go to local" and re-enables the front panel of an instrument that has been locked out via ++llc