Added functionality for corner detection.

> function se_FindCornerPoints(var ImgArr:T2DIntegerArray;
GaussDev:Extended; KSize:Integer; Thresh:Extended; MinDist:Integer):
TPointArray;

> function se_FindCornerMidPoints(var ImgArr:T2DIntegerArray;
GaussDev:Extended; KSize:Integer; Thresh:Extended; MinDist:Integer):
TPointArray;

> function se_CornerResponse(const ImgArr:T2DIntegerArray;
GaussDev:Extended; KSize:Integer): T2DExtendedArray;