* add readme with comments on debugging

* add optional CFLAGS in Makefile for debugging
* fix _patternChangeColor function in pattern.c
* add debug variant for measure exec function

main.c

@@ -9,6 +9,7 @@
 
 #include "led.h"
 #include "pattern.h"
+#include "measure.h"
 
 
 int main() {
@@ -28,7 +29,8 @@ int main() {
 
     ledInit();
     patternInit();
-    // ledSetMatrix(0, 1, BLUE);
+    measureInit();
+    // ledSetMatrix(0, 0, BLUE);
 
     __enable_interrupt();