Calibre Companion Demo Version

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V5.3.1.1 (25/May/2017 - Production)
- Support new calibre V3 content server
- Performance & reliability improvements in the CC content server connection
- Updated Languages: German, Russian, Vietnamese
- New Language: Polish
* Fix not being able to check the "Don't show again" box on small-screen devices
* Fix (I hope) problem connecting to Google Drive caused by Google changes