[Koha] Koha 16.05.13 release

The Koha community is proud to announce the release of Koha 16.05.13 This is a maintenance release and includes 36 bugfixes, and Hea2 :0) https://hea.koha-community.org/ The full release notes are available at https://koha-community.org/koha-16.05.13-release/ Packages will be available soon. Mason