Add info about archived status of cards

The idea is to run `update_suggestion_box` as a cronjob. Once a day/hour.. whatever suits best. If you wonder why I have done this on a separate script, and not included in the API call `/suggestions`, this is because Trello API is not precisely super fast, and I prefer this non-vital information to be 1h outdated than cause the suggestion box to load slowly because it has to fetch info from Trello.

Comments? :-)