Gallery-dl

- Added support for:
- `slideshare` - https://www.slideshare.net/ ([#54](https://github.com/mikf/gallery-dl/issues/54))
- Added pool- and post-extractors for `sankaku`
- Added OAuth user authentication for `deviantart`
- Updated `luscious` to support `members.luscious.net` URLs ([55](https://github.com/mikf/gallery-dl/issues/55))
- Updated `mangahere` to use their new domain name (mangahere.cc) and support mobile URLs
- Updated `gelbooru` to not be restricted to the first 20,000 images ([56](https://github.com/mikf/gallery-dl/issues/56))
- Fixed extraction issues for `nhentai` and `khinsider`

- Added the ``-r/--limit-rate`` command-line option to set a maximum download rate
- Added the ``--sleep`` command-line option to specify the number of seconds to sleep before each download
- Updated `gelbooru` to no longer use their now disabled API
- Fixed SWF extraction for `sankaku` ([52](https://github.com/mikf/gallery-dl/issues/52))
- Fixed extraction issues for `hentai2read` and `khinsider`
- Removed the deprecated `--images` and `--chapters` options
- Removed the ``mangazuki`` module

- Added an option to set a [custom user-agent string](https://github.com/mikf/gallery-dl/blob/master/docs/configuration.rst#extractoruser-agent)
- Improved retry behavior for failed HTTP requests
- Improved `seiga` by providing better metadata and getting more than the latest 200 images
- Improved `tumblr` by adding support for [all post types](https://github.com/mikf/gallery-dl/blob/master/docs/configuration.rst#extractortumblrposts), scanning for [inline images](https://github.com/mikf/gallery-dl/blob/master/docs/configuration.rst#extractortumblrinline) and following [external links](https://github.com/mikf/gallery-dl/blob/master/docs/configuration.rst#extractortumblrexternal) ([48](https://github.com/mikf/gallery-dl/issues/48))
- Fixed extraction issues for `hbrowse`, `khinsider` and `senmanga`

- Added support for:
- `xvideos` - https://www.xvideos.com/ ([#45](https://github.com/mikf/gallery-dl/issues/45))
- Fixed exception handling during file downloads which could lead to a premature exit
- Fixed an issue with `tumblr` where not all images would be downloaded when using tags ([48](https://github.com/mikf/gallery-dl/issues/48))
- Fixed extraction issues for `imgbox` ([47](https://github.com/mikf/gallery-dl/issues/47)), `mangastream` ([#49](https://github.com/mikf/gallery-dl/issues/49)) and `mangahere`

- Added support for:
- `warosu` - https://warosu.org/
- `b4k` - https://arch.b4k.co/
- Added support for `pixiv` ranking lists
- Added support for `booru` popular lists (`danbooru`, `e621`, `konachan`, `yandere`, `3dbooru`)
- Added the `--cookies` command-line and [`cookies`](https://github.com/mikf/gallery-dl/blob/master/docs/configuration.rst#extractorcookies) config option to load additional cookies
- Added the `--filter` and `--chapter-filter` command-line options to select individual images or manga-chapters by their metadata using simple Python expressions ([43](https://github.com/mikf/gallery-dl/issues/43))
- Added the [`verify`](https://github.com/mikf/gallery-dl/blob/master/docs/configuration.rst#downloaderhttpverify) config option to control certificate verification during file downloads
- Added config options to overwrite internally used API credentials ([API Tokens & IDs](https://github.com/mikf/gallery-dl/blob/master/docs/configuration.rst#api-tokens-ids))
- Added `-K` as a shortcut for `--list-keywords`
- Changed the `--images` and `--chapters` command-line options to `--range` and `--chapter-range`
- Changed keyword names for various modules to make them accessible by `--filter`. In general minus signs have been replaced with underscores (e.g. `gallery-id` -> `gallery_id`).
- Changed default filename formats for manga extractors to optionally use volume and title information
- Improved the downloader modules to use [`.part` files](https://github.com/mikf/gallery-dl/blob/master/docs/configuration.rst#downloaderpart) and support resuming incomplete downloads ([29](https://github.com/mikf/gallery-dl/issues/29))
- Improved `deviantart` by distinguishing between users and groups ([26](https://github.com/mikf/gallery-dl/issues/26)), always using HTTPS, and always downloading full-sized original images
- Improved `sankaku` by adding authentication support and fixing various other issues ([44](https://github.com/mikf/gallery-dl/issues/44))
- Improved URL pattern for direct image links ([30](https://github.com/mikf/gallery-dl/issues/30))
- Fixed an issue with `luscious` not getting original image URLs ([33](https://github.com/mikf/gallery-dl/issues/33))
- Fixed various smaller issues for `batoto`, `hentai2read` ([38](https://github.com/mikf/gallery-dl/issues/38)), `jaiminisbox`, `khinsider`, `kissmanga` ([#28](https://github.com/mikf/gallery-dl/issues/28), [#46](https://github.com/mikf/gallery-dl/issues/46)), `mangahere`, `pawoo`, `twitter`
- Removed `kisscomic` and `yonkouprod` modules

- Added support for:
- `2chan` - https://www.2chan.net/
- `4plebs` - https://archive.4plebs.org/
- `archivedmoe` - https://archived.moe/
- `archiveofsins` - https://archiveofsins.com/
- `desuarchive` - https://desuarchive.org/
- `fireden` - https://boards.fireden.net/
- `loveisover` - https://archive.loveisover.me/
- `nyafuu` - https://archive.nyafuu.org/
- `rbt` - https://rbt.asia/
- `thebarchive` - https://thebarchive.com/
- `mangazuki` - https://mangazuki.co/
- Improved `reddit` to allow submission filtering by ID and human-readable dates
- Improved `deviantart` to support group galleries and gallery folders ([26](https://github.com/mikf/gallery-dl/issues/26))
- Changed `deviantart` to use better default path formats
- Fixed extraction of larger `imgur` albums
- Fixed some smaller issues for `pixiv`, `batoto` and `fallenangels`