* update eslint's `comma-dangle` rule to `always-multiline`
* add check and fix scripts to package.json
* Invoke `yarn fix` to adopt the updated eslint rules. No other changes are included.
* RN-173 Added support for Markdown images
* RN-173 Added proper alt text when image fails to load
* Changed (edited) indicator not add itself as a child of an image
* RN-173 Removed space between an image and the following text
* Made sure MarkdownImage is mounted when setState is called
* Fixed images in links having their location overwritten
* Made images work in links
* Fixed uppercase links not working on Android
* Added vertical margin around images
* RN-173 Added styling for markdown image error text
* RN-173 Added error when image exceeds max dimensions on Android
* Added CommonMark-based post rendering
* Fixed text wrapping in most block elements
* Fixed paragraphs not being rendered as children of lists
* Replaced markdown images with a placeholder
* Fixed font colour in code spans
