A captain, no longer wanting to lead a team, can transfer captainship to another Member of DPChallenge (team member or not)
Captain should make a request through some interface
Once the request is made, each team member gets an email requesting a change
All team members must agree to the change before it happens (or maybe a small percentage?)
We'll need to keep a history of prior captains
During next season team creation, only the current captain can recreate the team
Transfer is an option available during team creation in case the captain doesn't want to continue, but team members want to maintain team stats
?Transfer is an option in the middle of the season?
?Captain becomes a member of the team when he steps down, or is removed from the team?