New Messaging System.

New Messaging System.

This system is indended to replace the old opacnotes
  and borrowernotes fields in the borrowers table.
  This system allows an unlimited number of Libraran and OPAC notes to be
  attached to a borrower. Each note has a message, a message type,
  the data it was created, and which library created it.
  Each message can only be deleted by the library that created it unless the syspref
  AllowAllMessageDeletion has been set.

  This system may be used simultaneously with the old notes system and does not affect it in any way.

  A new database table (messages) was added for this feature.

  The System also allows for pre-defined notes for Borrower records

  To use these, just create authorised values with the category BOR_NOTES
  where the Authorized Value is the short description shown in the pulldown,
  and the description is the text that should be in the note.

  Original Author: PTFS Contractor <dbavousett@ptfs.com>

  This work co-sponsered by Middletown Township Public Library, Middletown, NJ, USA
     and East Brunswick Public Library, East Brunswick, NJ, USA

Signed-off-by: Colin Campbell <colin.campbell@ptfs-europe.com>