a simple wrapper for certain funcs from the OpenCV library

   URL:http://opencv.willowgarage.com/

currently wrapped packages

opencv.GetAffineTransform() [lua] --> cvGetAffineTransform [C/C++]
opencv.WarpAffine() [lua] --> cvWarpAffine [C/C++]
opencv.EqualizeHist() [lua] --> cvEqualizeHist [C/C++]
opencv.Canny() [lua] --> cvCanny [C/C++]
opencv.CornerHarris() [lua] --> cvCornerHarris [C/C++]
opencv.CalcOpticalFlow() [lua] -->
- cvCalcOpticalFlowBM [C/C++]
- cvCalcOpticalFlowHS [C/C++]
- cvCalcOpticalFlowLK [C/C++]
opencv.CalcOpticalFlowPyrLK [lua] --> cvCalcOpticalFlowPyrLK [C/C++]
opencv.GoodFeaturesToTrack [lua] --> cvGoodFeaturesToTrack [C/C++]
opencv.DrawFlowlinesOnImage [lua] --> cvDrawFlowlinesOnImage [C/C++]
opencv.smoothVoronoi [lua] --> uses Voronoi triangulation to create dense map of a sparse set of points.