Host notebook data on external server

[artzet-s]

Remove data from git repo, located in example/data

[artzet-s]

On zenodo :

• 10 plant at one time from ZA16 from the same cabin
  • 3 young
  • 3 middle
  • 4 tall
• Chessboard images from the cabin choose at each 30° for top and side camera

[christian34]

Data are now hosted on a different repo (phenotyping_data).

Zenodo archive still needs to be created