- make `path` and `keywords` available in logging messages ([#574](https://github.com/mikf/gallery-dl/issues/574), [#575](https://github.com/mikf/gallery-dl/issues/575))
### Changes
- [danbooru] change default value of `ugoira` to `false`
- [downloader:ytdl] change default value of `forward-cookies` to `false`
- [downloader:ytdl] fix file extensions when merging into `.mkv` ([#720](https://github.com/mikf/gallery-dl/issues/720))
- write OAuth tokens to cache ([#616](https://github.com/mikf/gallery-dl/issues/616))
- use `%APPDATA%\gallery-dl` for config files and cache on Windows
- use `util.Formatter` for formatting logging messages
- reuse HTTP connections from parent extractors
### Fixes
- [deviantart] use private access tokens for Journals ([#738](https://github.com/mikf/gallery-dl/issues/738))
- [gelbooru] simplify and fix pool extraction
- [imgur] fix extraction of animated images without `mp4` entry