* Add support for textFurigana media
* Add readingMode parameter
* Implement readingMode
* Add {sentence-furigana} marker
* Fallback to sentence if furigana isn't available
* Update test data
* Add support for injecting the text selection into Anki cards
* Add selection-text
* Upgrade to add {selection-text}
* Update descriptions
* Update test data
* Add TemplateRendererMediaProvider to abstract media-related functionality
* Update representation of injected media
* Update templates
* Update upgrade file
* Update tests
* Update test data
* Force media to be an object
* Update test data
