====== Cantata 3 Requirements ======

  * Allow files to be uploaded of virtually any type.
  * Allow files to be deleted or replaced.
  * Can make PDF of selected songs
  * Can move a previously uploaded file to be attached to a different song - to create a different song version, for example.
  * Login required to view 
  * Login required to update songs or lists.
  * Ability to tag songs so that views can be filtered.
  * Library mode to see songs in file system, can pull into database, or change the song name to make a different version.