Added requirement of a Layer which has the property IsAquifer true. Requirement set by piping kernel. Refactored the SoilProfileReader so that it can be used to read profiles one at a time. Updated databases to reflect the requirement of IsAquifer. Updated queries used to gather all the soil profile information. Related to Issue [WTI-27] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@561 5a3db67b-de53-47b5-99c8-a1c30a6650e2