3M SIP2 Extensions groundwork and Patron Info popoulation

3M SIP2 Extensions groundwork and Patron Info popoulation

This includes some initial work for the 3M SIP2 extensions.
It also better populates the Patron object with methods for
a fuller Patron Information Reponse.  This is positively affect
EnvisionWare software, as used by NEKLS.

This work was sponsored by the Northeast Kansas Library System.

Signed-off-by: Galen Charlton <galen.charlton@liblime.com>