Tangelo versions of www and nbavis applications

In the interest of using as much of our XDATA technology as possible, I created Tangelo versions of the (excellent) bottle apps.  To reuse code, I had to tweak the bottle app a bit, and the source tree is a bit littered with symlinks, but both applications seem to be working now.

Let me know if I did anything too drastic and we can work to fix it.  For now, I'm going to host my branch on the XDATA VM for publication.