propagate elsewhere.is_team to participants.number
create GitHub.is_team_admin()
implement connecting elsewhere team accounts
allow pledge/lock/unlock for elsewhere team accounts
prevent connecting a team account without having another account to log in
move the list of team members to the bottom of the page
implement connecting a team account from the profile page
add platform.allows_team_connect
Merge pull request #2326 from gittip/elsewhere-teams

Elsewhere teams