fix #503: (#545)

set_cammodel of StereoCalibrator need to override the method of parent class

fix related to opencv/opencv#11085:
unlike cv2.calibrate, the cv2.fisheye.calibrate method expects float64 points and in an array with an extra dimension. The same for cv2.stereoCalibrate vs cv2.fisheye.stereoCalibrate

Trimmed whitespace at line endings

camera_calibration/src/camera_calibration/calibrator.py

@@ -1117,7 +1117,9 @@ def cal_fromcorners(self, good):
         self.l.cal_fromcorners(lcorners)
         self.r.cal_fromcorners(rcorners)
 
-        (lipts, ripts, _, _, boards) = zip(*good)
+        lipts = [ l for (l, _, _) in good ]
+        ripts = [ r for (_, r, _) in good ]
+        boards = [ b for (_, _, b) in good ]
 
         opts = self.mk_object_points(boards, True)