MissionSt/Marlin — pull request #20 by rosenhouse (2014-02-19 23:18:52+00:00)
Title: Allow run-time adjustment of z probe offset

Fixes #19: Z probe offset shouldn't be baked into hardware.

Most of the hard work here was already done, since there's support for changing this value via an LCD panel and storing it in EEPROM. So we only needed to add a custom M-code command for it.