window.cpp: added hook for imshow_winrt()
video.cpp/.hpp: complete most work to interface to HighguiBridge
MainPage.xaml.cpp: added note to implement: Video::get().m_cvImage = HighguiBridge::get().m_frontOutputBuffer
main.cpp: added imshow("xaml", frame);
cap_winrt.cpp: moved size processing into requestForUIthreadAsync(HighguiBridge_OPEN_CAMERA ...
cap_winrt_highgui.cpp/.hpp: put all input and output framebuffers and mutexes into HighguiBridge
cap_winrt_highgui.cpp/.hpp and window.cpp: added imshow_winrt(cv::InputArray img)
MainPage.xaml.cpp: added processing for HighguiBridge_UPDATE_IMAGE_ELEMENT event
video.cpp: implemented CopyOutputBuffer(), getting LINKER ERROR