Conflicts:
	wiki/src/doc/about/features.fr.po
	wiki/src/doc/first_steps/upgrade.pt.po
	wiki/src/support/known_issues.de.po
	wiki/src/support/known_issues.fr.po
	wiki/src/support/known_issues.mdwn
	wiki/src/support/known_issues.pt.po

Support running language_statistics.sh from the root of the repository too, and error out if it's not run from a supported place.

This in turn allows Tails Installer to use this binary and MBR, which is
critical for avoiding problems (such as #7345) on "Upgrade from ISO".

That's what users do, and is buggy. If one already has an up-to-date Tails USB
stick, they can "Clone and upgrade", and won't bother using an ISO image.

Still, let's keep the "Clone from ISO while running the new version" test,
as it tests the Installer in the tested (new) version of Tails, which makes
little sense wrt. what users will do when the new version is out, but may catch
bugs that will affect upgrades to N+1.

This also contains some re-wrapping noise. Sorry.

And some simple grammar correction.