Additional integration work for the Direct messaging module:

 1.Fixed installation mechanism to allow addition of more users (as services)
   after the main user has been added.
 2.Changed the unknown patient import screen to use patient_id=00 and added
   a warning here to only use this upload tool if the patient is not known.
   Note the point of this gui is twofold:
   a. Allow assigning of patients for documents imported via other services
      and tools where the patient was not yet mapped (for example, it will
      allow assigning of patients for documents imported via Direct service
     that are stored in the 'direct' directory).
   b. Allow manual importing of documents where the patient is not yet known
      or mapped (and then at a later date, can then assign the patient on
      this screen when known)
 3.Modified the Reports->Services->Background Services to display more
   intuitive results (and incorporated the automatic feature)