Änderungen

Summary

1. fix #167 and fenix callbacks now destroyed (details)
2. fix #166 (details)

Commit 343e8d875ed6a2a07dd9a7d183b3186ef4df94d7 by frotty fix #167 and fenix callbacks now destroyed
	wurst/closures/ClosureForGroups.wurst (diff)
Commit 322eb51fa8ff633e89d5342a70bdf4f57691636a by frotty fix #166
	wurst/_handles/primitives/String.wurst (diff)
	wurst/_handles/primitives/StringTests.wurst (diff)