Organization Improvements

We recently overhauled most of the permissions code in Challonge, making it far easier to confidently add new permissions-based features. The first of the resulting changes deals with organizations.

Up until last week, organization memberships merely allowed users to publish tournaments to an organization's subdomain. They offered no shared permissions. Well no longer! Organization hosted tournaments can now be managed by all their respective members.

Along with this change, we also improved navigation on the organization pages for members.

Currently in development:
group stages, integration of improved bracket algorithms, redesigned brackets