Fix startup error when apps list is not configured (issue #223)

Fix wrong variable initialization (issue #222)

Added Youtube cast doc (#219)

* Update README.md

Added doc for casting videos to Youtube, as described here: #145 (comment)

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Co-authored-by: ollo69 <[email protected]>

Update version

Minor fix in set_art_mode method

Fix exception on empty app list (issue #212)

Update version

Update version

Update version

Update version number