version 1.2.1:
 * fix a bug where the update-interval was initiated multiple times
version 1.2.0:
 * list all episodes
 * add switch for sign language
 * fix a bug with the "&" in episode titles
version 1.1.0:
 * add reload functionality (can be configured in the addon-settings)
version 1.0.3:
 * fix images not loading (removed query param)
version 1.0.2:
 * change json import
 version 1.0.1:
 * python3 compatibility
version 1.0.0:
 * initial version
