Merge https://github.com/timkoster/MarlinBlinkM into Marlin_v1

Marlin/Configuration.h

@@ -533,6 +533,9 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 # endif
 #endif
 
+// define BlinkM Support
+#define BlinkM
+
 // Increase the FAN pwm frequency. Removes the PWM noise but increases heating in the FET/Arduino
 //#define FAST_PWM_FAN