.gitmodules: ignore dirty submodules
Align.render_gcode: store the draw operations.. not used yet for anything, though
CncControl: added Z controls
CncControl: support for reseting Z position
Align, CncControl: don't actually reset device Z, but maintain a virtual reference
CncControl, Align: use the 3d position from CncControl
Align, CncControl: 3d-position pushed further down the code
Align, CncControl, GcodeMapper: support z-mapping
GcodeMapper.transform moved actual string conversion out the function