l10n: Updated Serbian (sr) translation to 100%

New status: 19 messages complete with 0 fuzzies and 0 untranslated.

Transmitted-via: Transifex (translations.xfce.org).
l10n: Updated Serbian (sr) translation to 100%

New status: 19 messages complete with 0 fuzzies and 0 untranslated.

Transmitted-via: Transifex (translations.xfce.org).
Created gitignore.
Add an explicit <xml> tag and assume other text is raw.