cudastereo: updated documentation for reprojectImage3D and drawColorDisp
cudastereo: updated documentation for reprojectImage3D and drawColorDisp

Updated the list of supported input formats, added note about 16-bit
signed format (no fractional bits).

opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv