t/internal.t: Remove TODO tests with #61 closed

Signed-off-by: Niels Thykier <niels@thykier.net>
Fatal: Fix typo in a comment

Signed-off-by: Niels Thykier <niels@thykier.net>
.travis.yml: Set "sudo: false" to use Travis linux containers

Signed-off-by: Niels Thykier <niels@thykier.net>