update Material
Merge branch 'master' of https://github.com/bboecherer/SailingSchoolManagerWPF
Materialupdate
App.config
Merge branch 'master' of https://github.com/bboecherer/SailingSchoolManagerWPF

Conflicts:
	SealingSchoolWPF/App.config
	SealingSchoolWPF/Resources/Language/Resource.Designer.cs
update Materialverwaltung