Bug fix and small changes to pointToPointresponse, tabletclient and images

Allow changing imagestate when pen is not touching
Added beep option to signify successful point to point movement
Added showPosition=2 (for tabletclient) to only show position when in
image state 1
Fix port numbers for DAQ server (to prevent conflict)
Remove 32-bit error message for tabletserver

Note: this requires updated Psychtoolbox tablet code