Move various release notes into correct directory

Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Adding new OPAC features to Release Notes.

Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Release note additions for new acquisitions features

Signed-off-by: Kathy Lussier <klussier@masslnc.org>
More release note entries

Additional release note entries in the areas of administration,
circulation, staff client, SIP, and serials.

Signed-off-by: Kathy Lussier <klussier@masslnc.org>