* Timeline
    * Amend Event
      * Amend operations targeting events older than <commit_delay hours> fail.

  * Timeline
    * Amend Event

    * Invitation validation

  * Invite
    * When a new participant is invited to the project, allow them to create an account.
      - inviting user asked to sign a txn that transfers a specific amount of btc from their
        current payout address to the invitee's payout address as confirmation of
        the invitation + script -- is this actually worth it? 

    * Amend Event
      * MAYBE garnish/reimburse based approach? 
    * Secure the transaction log via inclusion of periodic hashes of the log

    * Secure the event log via inclusion of periodic hashes of the log

    * Evaluate OpenID options
  * Companion Creation

    * Evaluate OpenID and jwt.io
  * User Creation

    * Require bodies of all requests to be PGP-signed; this will take the place of

    * Require bodies of all requests to be PGP-signed; this would take the place of

  addRoutes [ ("login", loginRoute)   
            , ("register", registerRoute)

  addRoutes [ ("login",             loginRoute)   
            , ("register",          registerRoute)