Bug 14249: Improve sample discharge letter (en)

Bug 14249: Improve sample discharge letter (en)

Improves formatting and wording as suggested by
Nicole on bug 14249.

To test:
- Activate UseDischarge
- Request a discharge from a patron account in the OPAC
- Confirm discharge from the start page of the staff
  interface
- Download PDF from the patron account in the OPAC
- Verify the displayed text is formatted and reads
  correctly

06/06/2015 15:18
Discharge confirmation
Midway certifies that the following borrower:
Firstname surname (cardnumber: 1)
has returned all items.

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Messages is Ok, no errors
I think you cant modify message using embeded CSS,
html -> pdf procedure ignores CSS.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>