Merge pull request #1780 from rembo10/develop

Add KAT proxy and fix nzbget URL
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Merge remote-tracking branch 'origin/develop'
Merge remote-tracking branch 'origin/develop'
Merge branch 'develop'
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Merge pull request #1795 from rembo10/develop

Update README.md
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Creating two functions from duplicated code
Removing duplications, replacing with functions
Removing duplications, replacing with functions
Removing duplications, replacing with functions
Use _file instead of file

since file is a built-in function
Create alltracks when adding album

Potential fix for https://github.com/rembo10/headphones/issues/1586
Return false on non existing dirs
Remove unused import
Duplicate track issue

Possible fix for https://github.com/rembo10/headphones/issues/1504
Merge pull request #1828 from multikatt/minor

Remove unused import
Remove from have when deleting Album
Extras changes

- Append secondary type to type description if different, e.g. Album +
Mixtape/Street
- Keep Extras in order
- Fix bug where albums not deleted from db if not in mb results when
refreshing Artist