moveoff: update for manpage and touchscreen use

moveoff_gui
  use button,increment,width for 'zero' button too (touchscreen use)
  for center option, compute postion after full size is known

pyngcgui_touchy_moveoff.ini
  use -noentry (for touchscreen)

moveoff.comp
  guard against epsilon pin == 0 by enforcing a minimum
  improve man page, use bolding markups

Signed-off-by: Dewey Garrett <dgarrett@panix.com>
moveoff_gui: --help: show opts defaults better

for options with no associated values

Signed-off-by: Dewey Garrett <dgarrett@panix.com>
Docs: update moveoff to match man page

Signed-off-by: John Thornton <jthornton@gnipsel.com>
moveoff_gui: correct text errors for is connected

with regard to move-enable pin at startup

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