Suggestion: 'Clan' game type

[e_i_pi]

Concise description:

• Clan game type, to run alongside Private, Public, and Tournament

Specifics:

• Tickable box labelled Clan
• Restricted to clan leader, or selected clan members for game creation, similar to tournament organisers

This will improve the following aspects of the site:

• Easier to search for clan games
• Opens up possibilities to complement future implementations

[blakebowling]

Clan Leaders are getting Tournament Privelages, as soon as OTIS comes out (clicky)