\usepackage{fontspec}
\setmainfont[Mapping=tex-text]{Linux Libertine O}


\newfontfamily\LibertineFont[Mapping=tex-text]{Linux Libertine O}
\newfontfamily\CaviarDreamsFont{CaviarDreams}
    [ Path=../fonts/
    , BoldFont = *_Bold,
    , Mapping=tex-text
    ]