Refactored line buffering to eliminate state from motion control and centralize tracking of position. UNTESTED: NEEDS TESTING

main.c

@@ -37,7 +37,6 @@ int main(void)
   settings_init();
   plan_init(); // initialize the stepper plan subsystem
   st_init(); // initialize the stepper subsystem
-  mc_init(); // initialize motion control subsystem
   spindle_init(); // initialize spindle controller
   gc_init(); // initialize gcode-parser