OS X: Make Qt application react on applicationShouldHandleReopen

Currently a click on e.g. the dock icon is not propagated to the
application so if for example the main widget is hidden, it doesn't come
back. This patch fixes it

Task-number: QTBUG-10899

[ChangeLog][QtGui][OS X] Fixes a bug where clicking on the dock icon
would not be propagated to the application

Change-Id: Ia02ca23ed0dafbd337d1d7d9bc5f7efe3843b512
Reviewed-by: Jake Petroules <jake.petroules@petroules.com>
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
Fix compilation of QtWebKit with MSVC 2012/2013

For some reason, MSVC 2012/2013 is no longer able to infer the
need for both a call to a constructor and a cast of its parameter
so we have to give a hint for at least one of these two operations.

Task-number: QTBUG-31882
Change-Id: I42b54313ec4f6a83cde28326534c59b93ab3f615
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Fix compilation of QtWebKit with MSVC 2013

Starting with MSVC 2013, more functions are provided.

Task-number: QTBUG-34705
Change-Id: I85e35a2486e0bd556f5f16e5911cca5c364273ed
(adapted from commit qtscript/24d678ce9c3996f46d1069c2b1193e7ec1083fc8)
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@digia.com>