Fullscreen / yt / 448

93%

master: 94%

Pull #350

travis-ci

Re-enable CI Tests

Introduces a number of changes in order to get tests working on CI, and
documents the necessary steps for running integration tests against the
codebase.

One change is that particular tests that run into rate-limit issues
quickly (such as those that create playlists) or that require
particular, YouTube-given permissions are tagged as such and disabled in
the normal test run. Also, all tests in the `as_content_owner` section
have been disabled, since they require a very particular (and brittle)
setup.

There are a few tweaks here and there changing magic IDs to new magic
IDs. The way these tests work should probably be reconsidered later.

Finally, the Travis config has been changed to work with a new version
of Ruby.

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