issue-23: update travis.
issue-23: update travis.

gopheracademy/gcon,gopheracademy/gcon,gopheracademy/gcon,gopheracademy/gcon,michaeljdennis/gcon,michaeljdennis/gcon,michaeljdennis/gcon,michaeljdennis/gcon,gopheracademy/gcon,michaeljdennis/gcon