HighGUI Module with new features (Qt only) see #245

- Reading window mode+pos+size from *.cfg
- Reading controls for buttonbar from *.cfg (Qt only)

This pull request replaces #245 and is now from highgui_qt-ext
should contain 13 file in total (new or modified)

On
http://build.opencv.org/pullrequest
there is "success" for Linux, Mac, Android  but not for Windows

but    \..\..\src\opencv\modules\ocl\
is not my Code...