Fix: Maya.get_referenced_versions() to return a unique referenced versions list.
Fix: Maya.get_referenced_versions() to return a unique referenced versions list.

sergeneren/anima,eoyilmaz/anima,eoyilmaz/anima,eoyilmaz/anima,sergeneren/anima,sergeneren/anima,eoyilmaz/anima,eoyilmaz/anima