Rework live-base and desktop minimization

First, strip the "minimization" parts out of fedora-live-base.ks,
and move them into fedora-live-minimization.ks.  All previous consumers
of fedora-live-base.ks are updated.

The old fedora-live-base.ks was conflating two entirely different
things:

* A live-based image which can be used to install
* Stripping some random bits to fit onto a CD

The previous fedora-livecd-desktop is now fedora-live-desktop.ks.
The new file fedora-livecd-desktop.ks is actually further
minimizations on top of fedora-live-desktop.ks.

Split up these two concepts so that fedora-live-desktop is *THE*
desktop.  What we expect everyone to have as a base, and the
exact same set of packages should be installed by Standalone
Anaconda (DVD) as well.  Then, we have minimization hacks
in fedora-live-desktop-cd.ks.

Over time, we should be shrinking the default install and making
it more just-in-time, by e.g. having many more things use
the PackageKit library to pull in components as needed.

fedora-livecd-kde.ks

@@ -8,6 +8,7 @@
 # - Fedora KDE SIG
 
 %include fedora-live-base.ks
+%include fedora-live-minimization.ks
 
 %packages