Implemented reading of characteristic points for MacroStability Inwards Related to Issue [WTI-1289]git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@10778 5a3db67b-de53-47b5-99c8-a1c30a6650e2Former-commit-id: aa61af9ba9961c72248208e04ead54cd77f43467Former-commit-id: e18feaea4887d582d579b66ca33bdefae1b4f8db