An interface for user administrative operations on a jobsDB

The following operations are supported. For a formal definition, please review the Service Description.

• RemoveUser
  Remove user from group.
• InviteUser
  Invite a user to a group.
• CreateGroup
  Create a new group
• CanReadTable
  returns true if a user can access this table, false if not
• IsOwner
• AcceptInvite
  Accept group invitation
• PublishTable
  Publish table
• DestroyGroup
  Must be owner or admin
• DePublishTable
  unPublish table
• DeclineInvite
  Decline group invitation