gmoccapy_0_9_9_9_9 - pin to modify soft limits

ver. 0.9.9.9.9
- I added three new hal pin. This pin do allow to reduce or
  enlarge the soft limits, so a pin is able to protect your
  rotary table from colision, because if you do not use it,
  you just reduce your soft limits, or you got a tool changer
  in the working area, you do not want a collision during normal
  work, but you are forced to enter the tool change area to change
  a tool, so during tool change you enlarge the soft limits.
  The pins are documented in the WIKI. You will get an error if you
  reduce the limits and you are outside the area!
Merge branch 'master' of ssh://norbert@git.linuxcnc.org/git/linuxcnc.git