Another massive change - this time to file list items (mostly)

There are some "sundry" changes (an html splash screen to cover up unsightly pre-css ugliness, some async changes so files and folders load at the same time, etc).

Mostly, this is about the folder listing. I totally changed the way the file lists look a couple times, but I think these are good now. It's set up for taps on the stars to add to favorites and  long taps for popping up a menu to choose the other things you can do on a file. None of those work yet, of course, but they are ready to be hooked up.

This is setting us up for file viewing. Coming to a branch near you.