Don't require league manager to be the first team in league

[JoeKennedy]

Also don't require the league manager to own any team in the league.

This could probably take a few forms. The easiest way would likely be to send out join emails to all members of the league, rather than all but the first. The issue with this is that if the league manager is in the league, they actually have to join it, rather than just being in it automatically.

Probably the way to go would be to grab the email for the user, in #2. And if it matches one of the team owner emails, mark that team as joined and add the league manager as the team owner. Otherwise, send out the join email to team owner's email address.

[JoeKennedy]

As part of this I could make a custom form that has a radio button (or tying in with #4, a check box) in each row for who the league manager is. This would allow me stop having to use the draftOrder column in the team's table and instead set it directly to the relevant team season.