add ifdef DEBUG_TIMING for fiming measurments

lib/treppe/treppe.cpp

 #include "treppe.h"
+// #define DEBUG_TIMING
 
 /*
     - dimmt stufe (0 - 15, PCA9685 outputs) mit linearen ticks
 
 void Treppe::task()
 {  
+#ifdef DEBUG_TIMING
   uint32_t m=micros();
+#endif
+
   fsm_inputs.ldr_schwelle = check_ldr();
+
+#ifdef DEBUG_TIMING
   Serial.print("1:");
   Serial.println(micros()-m);
   m=micros();
+#endif
+
   fsm_inputs.sensor_oben = read_sensor(SENSOR_OBEN);
   fsm_inputs.sensor_unten = read_sensor(SENSOR_UNTEN);
   fsm_inputs.anim_beendet = anim_beendet;
-  
+
+#ifdef DEBUG_TIMING
   Serial.print("2:");
   Serial.println(micros()-m);
-  
   m=micros();
+#endif
+
   FSMTreppe_Obj.setExternalInputs(&fsm_inputs);
   FSMTreppe_Obj.step();
   fsm_outputs = FSMTreppe_Obj.getExternalOutputs();
+
+#ifdef DEBUG_TIMING
   Serial.print("3:");
   Serial.println(micros()-m);
-
   m=micros();
+#endif
+
   print_state_on_change();
+
+#ifdef DEBUG_TIMING
   Serial.print("4:");
   Serial.println(micros()-m);
-
-
   m=micros();
+#endif
+
   if( fsm_outputs.status == ST_AUFDIMMEN_HOCH || 
       fsm_outputs.status == ST_ABDIMMEN_HOCH  ||
       fsm_outputs.status == ST_AUFDIMMEN_RUNTER || 
     else
       anim_tick();
   }
+
+#ifdef DEBUG_TIMING
   Serial.print("5:");
   Serial.println(micros()-m);
+  m=micros();
+#endif
 
 
-  m=micros();
   // else if (fsm_outputs.status == ST_DIMMEN_LDR) {
   //   if(anim_beendet) {
   //     berechne_dimmer();
   //   }
   //   anim_beendet = dimm_treppe();
   // }
-  
+
+#ifdef DEBUG_TIMING
   Serial.print("6:");
   Serial.println(micros()-m);
+#endif
 }
 
 void Treppe::berechne_dimmer()