desktop spin alpha readiness

[Matthias Clasen]

Hey, as every cycle, we have a size problem with the desktop spin:

https://bugzilla.redhat.com/show_bug.cgi?id=1000893

So, we need to do the usual excercise and cut stuff until it fits.

In addition to that, we will have a new application installer in F20
( https://fedoraproject.org/wiki/Changes/AppInstaller ), which will
allow us to properly present and feature applications that are not yet
installed. For that reason, the designers working on the app installer,
Ryan Lerch and Allan Day, have proposed that we don't install
transmission, simple-scan and gnome-photos by default anymore, and
instead feature them prominently in the app installer.

Unless there's strong opposition, I'll drop those three from the
kickstart file, and we can reevaluate the size issue on Monday.