solution: arduino-1.8.1 and problem with delayMicroseconds

[ivanpiffer]

to avoid the error "OneWire.cpp:122:23: error: 'delayMicroseconds' was not declared in this scope"
add the line
#include "Arduino.h" to OneWire.cpp

the result is:
"#include "OneWire.h"
#include <Wire.h>
//#include "Arduino.h"

// Constructor with no parameters for compatability with OneWire lib
OneWire::OneWire()"... ecc