Updates to the Timeline pages

I've changed the design on all the Timeline pages and have included the Music, Movies, and Literature links on each one. They're now much cleaner looking and can be printed easily. I've also been updating the links to the songs on those pages, since many of the previous sites no longer have those links. Archive.org is a great resource for songs and films; however, you're better off if you search under an artist's name, since searching by title sometimes gets no results.