\usepackage{fontspec}

\newfontfamily\CaviarDreamsFont{CaviarDreams}
    [ Path=\commonPath/../fonts/
    , BoldFont = CaviarDreams_Bold
    , Mapping=tex-text
    , Extension = .ttf
    ]

\newfontfamily\LibertineFont{Linux Libertine O}
    [ Ligatures=TeX
    ]