* All classes are in a Cite\ namespace now. No need to repeat the word
"Cite" all over the place.
* The "key formatter" is more an ID or anchor formatter. The strings it
returns are all used in id="…" attributes, as well as in href="#…" links
to jump to these IDs.
* This patch also removes quite a bunch of callbacks from tests that
don't need to be callbacks.
* I'm also replacing all json_encode().
* To make the test code more readable, I shorten a bunch of variable
names to e.g. $msg. The fact they are mocks is still relevant, and still
visible because these variable names are only used in very short scopes.
Change-Id: I2bd7c731efd815bcdc5d33bccb0c8e280d55bd06
