Write new test cases

[capjamesg]

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I have added a few tests for new features as I go but there are still some functions that do not have a documented test yet, such as the original post discovery mechanism. I would love to have at least one test for every function in the library.

Also, we should add more test cases for each function. I have added tests that relate to URLs on my site but this only accounts for one case. Adding test cases for other URLs will help us verify that the library is functioning as intended across different sites that mark up data in their own ways.

[capjamesg]

We should add an additional test to test_rel_me_auth_link_discovery.