Use WINVER instead of _MSC_VER for version check in qeventdispatcher_win.cpp.

Task-number: QTBUG-38604
Change-Id: Idb8a8219e09c6aa1a1b24e45b9da640c8d4b7161
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
(cherry picked from qtbase/e30ae1268f8e224369ff7841b90184c8694a86e7)
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Polish the image gestures example.

- Add command line parsing to properly evaluate help option and
  directory argument, add options to disable gestures.
- Add verbose option so that the user can actually see what is
  happening.
- Scale large images.
- Use qreal instead of float.
- Minor polishing: set window title, position file dialog at
  pictures location.

Task-number: QTBUG-37759
Task-number: QTBUG-37203
Change-Id: Ibaf54a13034b150386a8aee476f83a9eba298298
Reviewed-by: Indrajit Tapadar <indrajit.tapadar@digia.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
(cherry picked from qtbase/c0701f3789acf3234e9f6431b4e8c7dc3ccefabb)
Reviewed-by: Marko Kangas <marko.kangas@digia.com>