Use the documented 5 line prolog in every sample application. Tidy up sample prologs and header code.

samples/write-test.cpp

@@ -17,10 +17,8 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
  */
-// *****************************************************************************
-// included header files
-#include <exiv2/exiv2.hpp>
 
+#include <exiv2/exiv2.hpp>
 #include <iostream>
 #include <sstream>
 #include <iomanip>
@@ -46,6 +44,9 @@ int main(int argc, char* const argv[])
 {
     Exiv2::XmpParser::initialize();
     ::atexit(Exiv2::XmpParser::terminate);
+#ifdef EXIV2_ENABLE_BMFF
+    Exiv2::enableBMFF();
+#endif
 
     try {