[Fedora-spins] spin-kickstarts branched

[Bruno Wolff III]

I created the F-16 branch for spin-kickstarts. Changes for F17+ should go
to master and changes for F16+ should go to master and F-16. Please hold
off on F17+ changes until the nightly builds are switched over using F-16
or F16 is released (whichever is sooner).

(Nirik, can you switch the nightly builds over to building from the F-16
branch?)

Since the security spin has already had a change, I'll try to do one more
spin-kickstarts package several days before final freeze so that we get
a current spin-kickstarts in the release. At this point things should be
calming down and we should only be making changes to NTH and Blocker
bugs in the 4 main spins (Desktop, KDE, XFCE and LXDE). While other spins
don't have NTH or Blocker bugs, people should still be judicious about
making changes at this point in the release cycle.

Once the nughtly composes have switched over to F-16, I'll be changing
the master branch to use the rawhide repo instead of the fedora repo.
That will stay in effect until F17 is branched from rawhide.