Fiction-dl

**General:**

- Links (anchors) are now preserved in output files.

**Extractors**:

- Added an extractor for [AdultFanFiction](http://www.adult-fanfiction.org/html-index.php).

**Processing:**

- Improved horizontal line recognition.
- Improved story title processing.

**Stuff:**

- Reformatted *Style Guidelines* as Markdown.
- Reformatted changelogs as Markdown.

- Fixed a mistake in the readme.

- Reworked the way authentication works in all extractors.

- Added support for Reddit authentication.
- Expanded exception handling in the Reddit extractor.
- The Reddit extractor now handles extracting posts made by deleted users and suspended users.

- Added some more processing for story titles.

First release.