Display (& improve) an error message when updates.weboob.org does not respond
See this error: https://github.com/YunoHost-Apps/kresus_ynh/issues/28
The user could not understant what happened. An easy solution could be to put the link to be checked by the user. I don't know yet if we could catch a better error than ModuleInstallError
(the git.weboob.org site is down as well).
Edited by Nicolas Frandeboeuf