Replacement: addendum -> notes

[wg030]

As already discussed in the PR #99, I replaced \printfield{note} with \printfield{addendum} according to the biblatex documentation:

note field (literal)
Miscellaneous bibliographic data which does not fit into any other field. The note
field may be used to record bibliographic data in a free format. Publication facts such
as “Reprint of the edition London 1831” are typical candidates for the note field.
See also addendum.

addendum field (literal)
Miscellaneous bibliographic data to be printed at the end of the entry. This is similar
to the note field except that it is printed at the end of the bibliography entry.

[michal-h21]

Thanks!