Stenmark 0.7.1

• Date the 0.7.1 release entry to the actual release day
• Write the 0.7.1 release notes
• Add the 0.7.1 release entry
• Regenerate the template without the release notes
• Translate the screenshot captions into German
• Stop offering the release notes for translation
• Restore the Save translation dropped from ru.po
• Add Russian translation (#1)
• Update PKGBUILD checksums for v0.7.0