Added an XML code block to sample slides
Added an XML code block to sample slides

adamzap/landslide,ionelmc/python-darkslide,ptisserand/landslide,adamzap/landslide,kwangkim/landslide,adamzap/landslide,kwangkim/landslide,n1k0/landslide,netantho/epicslide,netantho/epicslide,n1k0/landslide,exciteresearch/landslide,ionelmc/python-darkslide,exciteresearch/landslide,ptisserand/landslide,ptisserand/landslide,kwangkim/landslide,exciteresearch/landslide,ionelmc/python-darkslide