Use Falling Fruit markers

[niccokunzmann]

Use the markers from https://fallingfruit.org/.

• [x] contact them https://github.com/falling-fruit/falling-fruit-mobile/issues/34
• [ ] make sure we display the copyright notice
• [ ] map their categories to ours https://fallingfruit.org/types.csv.bz2
  • [ ] in a reproducible script because we can not do that by hand if there is a change OR
  • [ ] OR check if new categories were added
  • [ ] add their translations
• [ ] implement download mode for a certain range as their data is 480mb huge OR prepare it for fast processing. Related for range: #111
• [ ] find a solution for missing markers - we can not create markers for 1000 categories
• [ ] tell people to use the falling fruit app if they like to publish plants or help implement this API and category choice
• [ ] do not show their categories
• [ ] if we show their categories, we must implement a search
• [ ] filter trees as falling fruit also has inedible trees

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