Änderungen

Summary

1. a little more group stuff (details)
2. Add GroupTests (details)

Commit 77bc379cbbfba80114c63de21528c56ba1983167 by frotty a little more group stuff
	wurst/_handles/Group.wurst (diff)
Commit 4f717e6c7f03a46854b79addeff2ba90c7a85ddc by frotty Add GroupTests
	wurst/_handles/GroupTests.wurst