{Feature Request} Time-Based/Hidden Elements

[jharbin]

I would like to have elements (Corps, Boxes, Flags) that only appear at certain times or after an amount of time has elapsed.

Scenario:
Corp 1 is active for week 1.
Corp 2 comes alive for week 2 and Corp 1 goes dark.
Final Challenges come alive on week 3, and Corp 1 and Corp 2 are dark.

(by dark, maybe they show up, but are not answerable, or may be hidden)

My reasoning is: trying to do a multi week competition where individuals only have a certain amount of time to complete that week's challenge, leading up to final winners challenge. I don't want to have to create multiple CTFs to be able to time constrain my elements, but it would be nice to do it all within a single CTF setup.

Already possible?