Merge pull request #32 from cbhaley/master

In device view: change so that "sync" icon has priority over "in library" icon
Implement adding of catalogs and news
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update empik plugin for website change
Merge branch 'stores' of https://github.com/t3d/calibre
version 0.9.39
Implement custom book data API
Ignore unused feeds API
Add legacy add_format API
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Merge branch 'kovidgoyal/master'