Enable range iterators on MSVC.

MSVC does not define __cplusplus as >=201103 yet.
An older version of MSVC is probably sufficient, but I can't test that.

src/OpenVolumeMesh/Core/Iterators.hh

@@ -131,7 +131,7 @@ private:
 };
 
 
-#if __cplusplus >= 201103L
+#if __cplusplus >= 201103L || _MSC_VER >= 1900 // an older MSVC version might be sufficient, didn't test
 
 #include <type_traits>