Add user status information

[amaatouq]

Using something like (mizzao/meteor-user-status) and make it available to the game designer. Statuses could include things like:

• active (i.e., looking at the game browsers)
• inactive (i.e., not looking at the game browser)
• idle (looking at the browser but no activity detected for 10 seconds?)
• offline (the browser is closed or the user is disconnected)

Luxurious feature: Would be nice if we have the duration of each statue for each player during a game. For example, maybe I do not want to pay people who are offline for more than 30 seconds. Or penalize people who were ide and inactive for 20 seconds etc.