Revert "Update messages.po"

This reverts commit 3cf3ea412ed02ac092f45c3156b32ff019810e15.
Fix l10n scripts not to garbage headers.
Use plural forms.
Fix whitespace, gettext is whitespace fragile.
Fix plural forms on archived articles.
Fix plural forms on feed count.
Fix remaining plural forms to work with gettext.
gettext whitespace fix
Regenerate templates.
Update czech translations.
Update all translations based on new templates and regenerate compiled files.