Merge branch 'feature/linux-3.10.11' into stable
Set exact versions in changelog.
Add missing release step.
Remove duplicate. We already set this envvar above.
Manually update SquashFS sort file for newer Linux modules path.

Since a few releases, the whole file update makes the boot much slower for some
reason, and we didn't have time to investigate yet. Still, it would seem
slightly dumb to keep obsolete paths in there, while we know what the up-to-date
path is, so let's update it manually.
Fully qualify paths.
More quoting.
Tidy some release process steps a bit.
Document that sometimes, removing live-media=removable can help, and why it is dangerous. Also list problematic USB sticks.
updated PO files
Simplify phrasing a bit.
Give the user a way out.
Merge branch 'master' of ssh://webmasters.boum.org/~/wiki
updated PO files
Add blueprint for Contribute section
Better contribute section proposal
Use `option` instead of `parameter` in boot menu

In order to be consistent with /doc/first_steps/startup_options.
Minor rephrase
updated PO files
Fix typo.