Changes needed to download notes as markdown with images using gnsync

[jezek]

To succesfully run this command on Manjaro

gnsync -f markdown -a --download-only --save-images --images-in-subdir -p .

the changes in this PR were needed.

Note: I followed the advice in Issue #136
Note 2: Can't run tests due to E ModuleNotFoundError: No module named 'geeknote' error, so I don't know if the tests pass :/

[vitaly-zdanevich]

Thanks for your contribution, but this repo looks like abandoned :(

Geeknote cannot show notes for me #137

Would you like to fork it and maintain?

[jezek]

Would you like to fork it and maintain?

Certainly not. I've just tried to use gnsync to download my notes, I'm migrating away from Evernote, so I won't need this app again.

But even when it didn't worked out of the box, there was not much effort to make it work for my case and it helped me in my mission. So I decided to make this PR to give something back to the community.

I hope you all find a good maintainer.