[patch] saving to bugzilla, redux

[Chris Lumens <clumens redhat com>]

Here's another patch set to implement the saving to bugzilla feature.  I'll
assume everyone remembers the discussion from earlier.  If not, just go look
it up.  This set is different from the first in the following ways:

* Saving via scp is back, and I redid the UI to be one of those drop downs
  with the changing widget area underneath, a la Apple, instead of having
  some super complicated single UI.

* There's now an intermediate abstraction layer, which you can see in the
  "import filer" in various places.  The idea here is that the InstallClass
  has a reference to a bug filing class.  The default BaseInstallClass just
  uses an abstract one which isn't capable of doing anything.  The RHEL and
  Fedora InstallClasses then use a real one.  That in turn makes use of
  Will's python-bugzilla module.

I'll post the filer code as a followup to this thread.  It's kind of lame, and
needs lots of comments and the like.  Also I have no idea where it should
live since it's currently just a single little python file.  If this is only
ever going to get used in anaconda, perhaps a subpackage or just living inside
the anaconda source.  Otherwise, unknown.

Comments?

- Chris