Fisheye camera support

[yudai-kato-aisin]

Is your feature request related to a problem? Please describe.
I'd like to use images take from fisheye camera with pcd file.
It seems Automan currently supports radial distortion model of OpenCV, but does not support fisheye because the dist_coeff has 5 parameters that is same with following radial distortion model.

• radial distortion model (5 coeff) : http://labs.eecs.tottori-u.ac.jp/sd/Member/oyamada/OpenCV/html/py_tutorials/py_calib3d/py_calibration/py_calibration.html
• fisheye distortion model (4 coeff) : https://docs.opencv.org/3.4/db/d58/group__calib3d__fisheye.html

Describe the solution you'd like
be able to use fisheye's camera calibration model using the above OpenCV's fisheye camera calibration.

Describe alternatives you've considered
no idea.

Additional context
I have tried to understand the code to modifty the camera model by myself, but I could not.
If you don't mind, could you tell me what lines of code should I change?