Bring in Louisa Luciani's GSoC 2008 work, a DragonFly LiveDVD that is

Bring in Louisa Luciani's GSoC 2008 work, a DragonFly LiveDVD that is
buildable using our nrelease framework.

Thank you very much, Louisa! :)

Louisa did a lot of work into this LiveDVD (which is something that
has been discussed for years on the lists and in IRC), and I am
really pleased with the result. Others who have already checked out
the ISO she put up liked it, too.

I did some minor changes, notably making sure that corecode's nightly
snapshot builds won't be influenced by this commit (by moving the
installer script from nrelease/installer to nrelease/gui for now).

Note that due to some pkgsrc problems a number of packages had to be
custom built for the ISO, and the LiveDVD will not build using only
the binary packages from pkgbox. The needed packages will be put up
shortly.

Submitted-by: Louisa Luciani <lolaluci@gmail.com>