reduce diffs with dev branch

sim/Makefile

@@ -17,7 +17,7 @@
 
 PLATFORM   = LINUX
 
-OBJECTS    = main.o simulator.o serial.o ../main.o ../protocol.o ../planner.o ../settings.o ../print.o ../nuts_bolts.o eeprom.o ../serial.o avr/pgmspace.o avr/interrupt.o avr/io.o util/delay.o util/floatunsisf.o ../stepper.o ../gcode.o ../spindle_control.o ../motion_control.o ../limits.o ../report.o ../coolant_control.o ../probe.o ../system.o kbhit.o platform_$(PLATFORM).o
+OBJECTS    = main.o simulator.o serial.o ../main.o ../protocol.o ../planner.o ../settings.o ../print.o ../nuts_bolts.o eeprom.o ../serial.o avr/pgmspace.o avr/interrupt.o avr/io.o util/delay.o util/floatunsisf.o ../stepper.o ../gcode.o ../spindle_control.o ../motion_control.o ../limits.o ../report.o ../coolant_control.o ../probe.o ../system.o platform_$(PLATFORM).o
 CLOCK      = 16000000
 EXE_NAME   = grbl_sim.exe
 COMPILE    = $(CC) -Wall -g -DF_CPU=$(CLOCK) -include config.h -I. -DPLAT_$(PLATFORM)

sim/kbhit.c

@@ -1,6 +0,0 @@
-#include <sys/types.h>
-#include <sys/time.h>
-
-#include "kbhit.h"
-
-

sim/serial.c

@@ -26,8 +26,6 @@
 #include "simulator.h"
 #include <stdio.h>
 
-#include "kbhit.h"
-
 
 //prototypes for overridden functions
 uint8_t orig_serial_read();