Tenants as Subdomains #518

Given our nested tenancy structure, this merits some debate re: value and implementation. Usually, SaaS products use a subdomain to indicate to the platform and to a user that they're restricted to content/config in that tenant. Our platform may be more 'flexible', however, and could make this paradigm more complicated and unnecessary. At the very least, it may be used to let supervisors bookmark a tenant and be dropped into it upon visiting/logging into that URL.

Let's use this issue to debate.