ANN: Updated NVDL Tutorial

Hi Folks,

I updated my NVDL tutorial:

http://www.xfront.com/nvdl/

I added:

  - nine lab exercises (with answers)
  - an NVDL FAQ page
  - a section on NVDL triggers
  - a page on the NVDL mailing list
  - a page titled "A New Breed of Developers" 

Comments welcome.

/Roger