Update `trunk/L10n' directory structure:
- Add `trunk/L10n/Manuals/Distro' directory and move translations
files from
`trunk/L10n/Identity/Models/Themes/Default/Distro/5.5/Notes/...'
into it.
- Move translation files from
`trunk/L10n/Identity/Models/Themes/Default/Distro/5.5/Media' to
`trunk/L10n/Identity/Models/Themes/Default/Media' directory.