Git commits in Moodle x.x.x by Justus Dieckmann

commit ba2fc8bd9437b93d96f1d098396726afe39581b1
Author: Justus Dieckmann <justusdieckmann@wwu.de>
Date:   Mon, 26 Aug 2019 21:18:52 +0800
Tag:    v3.8.0-beta

MDL-66496 mod_data: Import author information on csv import

commit 609203ada6533296872b58f38fca1aac3f6bf2df
Author: Justus Dieckmann <justusdieckmann@wwu.de>
Date:   Tue, 15 Jan 2019 03:16:55 +0800
Tag:    v3.5.5

MDL-58256 group: prevents users to be added to a group twice

commit d783d4759c22c4ed1e8f72f832d668069424f71f
Author: Justus Dieckmann <justusdieckmann@wwu.de>
Date:   Fri, 21 Dec 2018 03:19:38 +0800
Tag:    v3.6.3

MDL-58256 group: prevents users to be added to a group twice

commit 8516febdd7c11fc8d399765e821d35db7eff349e
Author: Justus Dieckmann <justusdieckmann@wwu.de>
Date:   Fri, 21 Dec 2018 03:19:38 +0800
Tag:    v3.7.0-beta

MDL-58256 group: prevents users to be added to a group twice