Add OpenCV template matching to vision library

[madfrog54321]

Using OpenCV template matching the vision library will perform template matching on a streaming source (i.e. video file, webcam).

Requirements

• A class with the following public interface is created:

class TemplateMatchingDetector {
public:
  TemplateMatchingDetector(cv::VideoCapture imageStream, cv::Mat templateImage, float sensitivity);
  std::tuple<bool, float, float> update();
}

• TemplateMatchingDetector(...) creates a TemplateMatchingDetector object given a cv::VideoCapture (i.e. video file, webcam), a cv::Mat (i.e. image), and a sensitivity (i.e. needed match strength from the template matching algorithm to return a positive match).

• update() reads a cv::Mat using the >> operator on the cv::VideoCapture object, and then performs OpenCV template matching on the frame. The returned tuple<bool, float, float> is of structure tuple<[is the template image found?], [the x coordinate of the template image from -1 to 1], [the y coordinate of the template image from -1 to 1]>