Added OpenCV project properties in VS project

Added project properties that link the Visual Studio project to OpenCV.
Added properties for both `Debug` and `Release` configuration.
Only links to the library `opencv_core` as of now. Other libraries can
be linked by following the instructions in the tutorial.
Tutorial:
http://docs.opencv.org/doc/tutorials/introduction/windows_visual_studio_Opencv/windows_visual_studio_Opencv.html#the-local-method