[Shotwell] slideshow video export

[me at ibotty.net]

hello,

in a mail from 22th of august [1] by alexandre rosenfeld, it says, that
the improved slideshow is done, but the code seems not to be merged into
the git repository as of today. where can i find the patch? i can live
with the listed restrictions for now :).

thanks in advance,
 tobias florek

[1] http://lists.yorba.org/pipermail/shotwell/2011-August/002725.html