Photo Slide Show Half Implemented

The slide show has been implemented and works. It's dynamic, meaning any
photos uploaded to the image directory will be dynamically injected into
the web page, and the slide show will cycle through the added photos no
problem. I'd like to add complexity to the slide show page, allowing for
users to make their own albums that they can in turn see slideshows of.
For now, a giant page full of photos is fine.

TODO: User albums, an info page, a calendar database, and lots of other
things that I haven't thought of yet. It's getting there.