It was a long road for me but I learned a lot.
Attached is the script itself, json parser and escapeString. You can
attend it to denemo.scm
I tried to make enough comments so it should be readable.
Usage: Right Click on a scripted menu item and choose "upload to
denemo.org"
Error handling for: Server unavaible (no internet, site is gone...)
and
no Login because of Username or Password.
If an error happens Denemo writes it to the console.
I asked around a bit (#GNU and #fsf - Free software Foundation) and
scripts have to be under the same license as the main software,
especially if they are so close to the main app) . So I removed the
license check and its always GPL.
I think this is ready to release.