Example does not compile under XCode 9.2 / iOS 11.2

[zero0cool0]

The OCLibraryExample of a vanilla git clone of https://github.com/owncloud/ios-library.git does not compile anymore for two reasons

• OCOAuth2Configuration.h not found in OCCommunication.h
• [[AppDelegate sharedOCCommunication] setCredentialsWithUser:user andPassword:password]; in ViewController.m because setCredentialsWithUser does not exist anymore and probably needs to be replaced with setCredentials:(OCCredentialsDto *)