update release notes for 2.2.1

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
bump up version number to 2.2.1

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
update ChangeLog for 2.2.1

Signed-off-by: Galen Charlton <gmc@esilibrary.com>