Converted remaining latin-1 localizations to UTF-8 (da/de/es/nl/sv).

Converted remaining latin-1 localizations to UTF-8 (da/de/es/nl/sv).
For compatibility with existing installations, a latin-1 proxy language
module can be activated by setting $wgUseLatin1 = true; which will convert
messages to Latin-1 and use the Latin-1 support code as necessary.