Implemented synchronization message output for NanoDLP printers (nanodlp.com).
If optional feature is enabled in `Configuration_adv.h`, Marlin will ouput "Z_move_comp" string to serial after completing any G0/G1 Z-axis movements. This feature patched on previous versions(1.0) is used by NanoDLP to synchronize Z-axis movement with projector exposure in DLP stereolithography printers.
* Fix thermal protection documentation.
Even before the recent thermal protection changes, the documentation of
the thermal protection feature in the config files did not match the
implementation. I fixed the documentation and reconciled the M303
implementation with the documentation.
* Applied documentation changes to sample config files
* Renamed hysteresis to watch_temp_increase
* Added gcodes back into documentation.
* Initial conflict resolution
All previous items resolved:
- Use of ELAPSED() on timer code
- Switch to use of defer_return_to_status=true as much as possible
- Update & Clean Up of Max7219 routines
* Resolve non-SD case in ultralcd.cpp
