gremlin -remove leading tabs, no other changes
gremlin -silence errors when linuxcnc not running

If linuxcnc is not running but gremlin is, there was polling
errors. Silence these.
gladevcp -HAL_gremlin: silence Gcode error messages

Gcode errors are printed twice for some reason which causes
an error. We override gremlin's method and change it to print
directly. It still prints twice but doesn't cause an unhelpful
error message for users.