Added GroupHelper

Author torsten.philipp <torsten-philipp@web.de>
Author date 2018-03-29 21:52:39
Author local date 2018-03-29 23:52:39 +0200
Committer torsten.philipp <torsten-philipp@web.de>
Committer date 2018-03-29 21:52:39
Committer local date 2018-03-29 23:52:39 +0200
Commit fb915627a8338a395a4adeab8f5d14034fb89085
Tree 071389236fb1fdf4c3ae68ec99d8ee12f1d63ba6
Parent 83f1c8a6f85730201ce80ddf12113da24007b431
Added GroupHelper