moveoff.comp; checks for axis specifiers

Signed-off-by: Dewey Garrett <dgarrett@panix.com>
axis.py: new pin axisui.resume_inhibit

use case:  an external offsetting application
           may want to prevent resuming a paused
           program until after externally
           applied offsets are removed

Signed-off-by: Dewey Garrett <dgarrett@panix.com>
moveoff_gui: inhibit resume if parent gui allows

If the parent gui (like axis) provides a pin named *resume-inhibit,
(like axisui.resume-innibit) then that pin will be used
to inhibit program resume when offsets are applied

Signed-off-by: Dewey Garrett <dgarrett@panix.com>