Comments

Card: https://trello.com/c/DOb3MOBk/10-comments-on-a-card-last-comment-at-the-top-initially-just-record-who-commented-and-what-did-they-say-that-s-all

Realtime and e-mail were too large for a single iteration, thus let’s keep them separate (as they are in cards, after all).

Please, @exalted give this a look :smile: 
What about https://github.com/task-planner/task-planner-web/pull/15/files#diff-21497849d8f00507c9c8dcaf6288b136R3?