gmoccapy_0_9_9_9_12 - new hal pin to reset overrides

ver. 0.9.9.9.12
- added two hal pin to reset feed and spindle override
  gscreen.reset-feed-override
  gscreen.reset-spindle-override
gmoccapy_0_9_9_9_13 - solved spindle on/off bug

ver. 0.9.9.9.13
- solved a bug switching on/off the spindle if also log_actions
  was active, solved that one
gmoccapy_0_9_9_9_14 - box_coolant_and_spindle as EMBED_TAB_LOCATION

ver. 0.9.9.9.14
- The usage of  "EMBED_TAB_LOCATION = box_coolant_and_spindle"
  will not hide the velocity widgets any more, plasma handles
  that one now over tool_info_panel
gmoccapy_0_9_9_9_15 - new hal pin to show errors to hardware

ver. 0.9.9.9.15
- new hal pin gscreen.error as bit out, to show an error to the
  hardware, so a light can lit or even stop the machine. It will
  reseted with the pin gscreen.delete-message. This command will
  delete the first error and reset the gscreen.error pin to False
  after the last error has been cleared. Messages or user infos
  will not affect this pin!
gmoccapy_0_9_9_9_16 - option to show an logo

ver. 0.9.9.9.16
- a manual entry in the preference file logo = True in
  combination with logofile = "absolute path to logofile"
  will hide the jog button, jog increments and ignore limits
  and display the logo instead.

This option will remain undokumented