update readme.txt
Description
The readme.txt is containing very old information, mostly outdated.
I just fixed the links to start contributing and developer list email; I assume you'll see the need for more improvements.
Environment
None
Status
Assignee
Emmanuel Bernard
Reporter
Sanne Grinovero
Labels
None
Suitable for new contributors
None
Pull Request
None
Feedback Requested
None
Components
Fix versions
Priority
TrivialConfigure