Bug 22818: Add notices sysprefs and DB column

Bug 22818: Add notices sysprefs and DB column

This patch adds two new sysprefs. 'ILLDefaultEmail', 'ILLSendStaffNotices' and a new column to the
branches table called 'branchillemail'. It also adds five ILL related
notices.

Here we are providing the ability for a branch to have a dedicated email
address for it's ILL staff, the idea being that any notices sent by ILL
to staff need to go to specific staff, rather than the general branch
email address. If no branch specific address is defined, the address
specified in the ILLDefaultEmail syspref is used.

We're also providing a syspref 'ILLSendStaffNotices' to allow the user to specify which
notices should be sent to staff upon certain events.

We are also providing patron messaging preferences for the two patron
bound notices

We are also providing five notices for various ILL related events.

Sponsored-by: PTFS Europe
Signed-off-by: Niamh Walker-Headon <Niamh.Walker-Headon@it-tallaght.ie>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>