Create API to query and manipulate entries

Responding to request #1, the attached code is currently only a skeleton implementation, with a handful of comments marking TODO items.

The token parameter will be required for any edit actions. (edit/add/delete) Your unique [edit token](https://www.mediawiki.org/wiki/Manual:Edit_token) changes between sessions and can be looked up through the API by logging in and then requesting `/api.php?action=tokens&format=json`

All actions can be performed in a single request (deleting, editing, adding, and searching) and the results will be returned within that single request.