Implemented reader for the Hydra-Ring settings database. Created HydraRing subdir in Ringtoets.Common.IO for containing ringtoets specific and hydra-ring related IO classes. Made Settings objects public so that they can be initialized outside Hydra-Ring Related to Issue [WTI-919] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@6383 5a3db67b-de53-47b5-99c8-a1c30a6650e2