When a question is asked, label issue as "info needed"

[brettcannon]

Would probably need to have a template form, like Question for @...: in order to trigger the bot to add the label and know when to remove the label when the other person responds.

[brettcannon]

Can also use /info needed. Can either remove the label when a non-team member replies or when the person the who was first mentioned by @ replies (probably depends on how long we choose to keep the issue open while we wait).