Readinglist

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**Breaking changes**

- PUT endpoint was disabled (ref 42)
- ``_id`` field was renamed to ``id`` (ref PR 91)
- FxA now requires a redirection URL (ref PR 69)

**New features**

- URLs uniques by user (ref 20)
- Handle conflicts responses (ref 45)
- Conditional changes for some articles attributes (ref 6)
- Batching support (ref 2)
- Pagination support (ref 25)
- Online documentation available at https://readinglist.readthedocs.io (ref PR 73)
- Basic Auth nows support any user/password combination (ref PR 78)

**Bug fixes**

- ``marked_read_by`` was ignored on PATCH (ref PR 72)
- Timestamp was not incremented on DELETE (ref PR 95)
- Fix number of bugs regarding support of CORS in error views (ref PR 105)
- Previous Basic Auth could impersonate FxA user (ref PR 78)

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- Allow Cors (67)
- Log incomming request to the console (65)
- Add timestamp for 304 and 412 response (40)
- Add time vector to GET /articles and GET /articles/<id> (4)
- Preconditions Headers for Update and Creation (60)
- Provide number of items in headers of GET /articles (39)
- Check for filter values (58)
- Handle article title length (37)
- Support min, max and no keywords filters (43)
- Prevent to modify read-only fields (26)
- Filtering and sort querystring (44)
- Redis storage (50)
- Handle errors (24 - 49)
- Add loadtests (47)
- Handle API version in URL (33)