Fix XCode Project paths
Add cm_get_runtime_busy gate to queue flush, and add it to sequencing callback
On queue flush, send qr: and rx: reports
Homing Cycle Improvements (misc), get rid of verify_position

-Save & restore feed rate mode
-Remove verify_position stuff (it doesn't work on the Othermill)
-Read sw.state[X] instead of using read_switch(X)
-Commented version of duff's device for _get_next_axis
Jogging cycle improvements: save feed rate mode
Probing Cycle Improvements: end cycle & switches

-Read sw.state[X] instead of using read_switch(X)
-Make _probe_restore_settings act more like other cycle end functions
Fix bug in sr_set_status_report where it was incorrectly counting the number of modes set
Fix a race condition in switch debouncing code