Bug 12244 - Update Patron help files for 3.16

Bug 12244 - Update Patron help files for 3.16

This updates the patron help file and adds a missing help file.

To test:

* Go to a patron record
* Click help and confirm text is correct
* Go to patron's purchase suggestions
* Click help and confirm that help file is there and correct

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Both text are correct, link still points to 3.14 manual, but depends
on a value that must change with new release.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>