Create a new Gem qbwc-multi-tenant that adds multi-tenant compatability to the official qbwc Gem.
Should work with multi-tenant rails gem, but not require it. If there is a current_tenant, use that.
Should have migrations and a generator for adding tenant_id to the sessions and jobs table.
Should extend pending_jobs, clear_jobs, etc to require a tenant.
Should provide a method for multi-tenant authentication.