Added install files for Owl Carousel

The requisite files for installing the jQuery plugin "Owl Carousel" have
now been added: "owl.carousel.min.js", "owl.carousel.css", and
"owl.theme.css".
Images and info appear in owl-carousel

The images of the song posters, the song title information, and the song
performer information now appear in the individual panels of the owl
carousel.
Added click functions to all images

When images are clicked, the video player cues to the corresponding
karaoke video and plays it.
Added description list items
Debugged custom javascript files

I debugged "karaoke.admin.js", "karaoke.js", and "youtube.js".
Added functions to "karaoke.js"
Added new functionality on owl navigation
Modified owl navigation buttons
Modified datatable layout
Modified owl carousel pagination buttons
Modified "karaoke.admin.js"

I took the changes in "karaoke.js" (which determines the interface of
the publicly accessible webpage) and integrated them into
"karaoke.admin.js" (which assembles the interface for the registered
users and administrator/s).
Minor modification to "karaoke.js"