filesystemmodel branch - initial testing

[Federico Mena Quintero <federico novell com>]

Humans from Earth,

I'm finally testing Company's filesystemmodel branch.  IT IS SO FAST!
Really, it makes the file chooser much snappier.  And the code is a
pleasure to read.

I haven't had crashes yet, although I haven't tested all the features in
the file chooser.  I guess I'll keep testing it for a week or so.
Matthias mentioned that he's interested in merging this to master before
the .2 release.

I'm extremely happy with Company's work - he deserves a lot of beer and
pats on the back.

  Federico