Fix URLs.
Improve release process.
Leaner text, to make it fix in the download box.
Remove buggy (and contentless) translation.
Fix security advisories date.
updated PO files
Use "Contribute" instead of "Help".

Helping is something that one does from the outside, and we likely want to
convey a more inclusive meaning.
Rephrase a few task description.
updated PO files
Fix link to changelog.
Merge branch 'master' of ssh://webmasters.boum.org/~/wiki
updated PO files
Add missing Changelog entry.
Merge branch 'master' of ssh://webmasters.boum.org/~/wiki
Link to the changelog in the master branch.

The one in the 0.20.1 tag is missing the Iceweasel update.
updated PO files
Fix announce, again.
updated PO files
Fix link.
updated PO files