make rpt_exception take char* instead of char_t*
break dwell execution into segments, move out-of-band dwell to planner
fix probe output to match OMC V1 behavior
Merge branch 'merge_helper2' of github.com:omco/g2 into merge_helper2

Conflicts:
	TinyG2/canonical_machine.cpp
	TinyG2/planner.cpp
port probe position_resetting fix from V1
change motor and y backoff settings