added end function to TwoWire

Author: tijnkooijmans

Diff for: libraries/Wire/src/Wire.cpp

@@ -363,5 +363,10 @@ void TwoWire::dumpI2C()
     i2cDumpI2c(i2c);
 }
 
+void TwoWire::end()
+{
+	i2cRelease(i2c);
+}
+
 TwoWire Wire = TwoWire(0);
 TwoWire Wire1 = TwoWire(1);

Diff for: libraries/Wire/src/Wire.h

@@ -131,6 +131,7 @@ class TwoWire: public Stream
 
     void dumpInts();
     void dumpI2C();
+    void end();
 };
 
 extern TwoWire Wire;