Discussion threads

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Each article should have discussion thread attached. It should allow for commenting in the main thread, or adding comment in a new thread to previous comment.

Every comment may be formatted with markdown, may have files or pictures attached (up to 2 MB), and emoticons from simple set.

Article editor

There should be automatically created table of content based on headers. It should be displayed in the right column (but collapsable especially on mobile screens). Table of content if on should always be displayed on top of browser screen.

Also add version tracking tab, where user can compare to different versions of article to each other in two columns.

Add feature allowing to add notes to sections of articles. Notes should be displayed on a tab switchable with table of content. Notes should be displayed near the corresponding section. Notes can be edited or removed by author or owner.

Add ability to add links from selected piece of text to another article in the same specification. When user select chunk of text small popup should appear with ability to add note and add link or follow link if linked text is selected.