TinyURL - use API

[genio]

Use their API: http://www.tiny-url.info/open_api.html

Making use of the API rather than the old /api-create.php endpoint would likely get rid of the random failures in the test suite as they don't limit the usage based on time at that endpoint.

However, signing up for an account makes testing more difficult. We could mock the service for testing purposes and have end-users have to get their API keys on their own.

[oliwer]

Other option : use the new API if the user has given a key, and fallback to the old API by default. You would still need to mock the service for tests i guess.