Merge pull request #671 from NicoleRauch/master

Added two new management views
I'd rather display those members whose money I did not receive yet...
Learned something about moment ordering and fixed two bugs in one go :-) (1. Array.sort should not be called on the wrapper; 2. Lodash.sortBy returns useful results for moments whereas Array.sort does not)
Clarified the interface of registrationDateOf: It only needs a memberId, not a full-fledged member
Use the minimum function because it is more semantics-revealing.
Clarified the interface of registrationDatesOf: It only needs a memberId, not a full-fledged member
Clarified the interface of resourceNamesOf: It only needs a memberId, not a full-fledged member
For notification purposes, it is easier to have both information in one table.