Add a stub .travis.yml
Add a stub .travis.yml

This is at the moment just so that we can use Homu.  In the future I'd
like to make travis just one of multiple PR testers we use.

gatispaeglis/ostree,gatispaeglis/ostree,gatispaeglis/ostree,gatispaeglis/ostree,GNOME/ostree,GNOME/ostree,GNOME/ostree,GNOME/ostree,gatispaeglis/ostree,GNOME/ostree,gatispaeglis/ostree