Fix Travis deployment
Fix Travis deployment

Because of the use of `sudo` the created file is owned by root and the default travis user has no permission to deploy it. Using `chown` fixes this.
Also added a condition on the deploy, so only one file gets deployed.

ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz