fixing tierpsy issues

[d2fong]

1. As of Jan 30, 2020 pandas released a new version which breaks tierpsy
   to fix it, after installing tierpsy conda forge, run:

conda install pandas==0.25.1

2. cv2.findCountours function breaks tierpsy because of cv2 version issues
   either install cv2 3 or fix these in the anaconda env site packages