PipingOutput not deletable by using <delete> in tree. Made PipingFailureMechanism observerable. Added validate context menu item on PipingDataNodePresenter. Implemented Validate routine in PipingCalculationService. Added PipingCalculationResult for different possibilities of results. Added TestPipingOutput which can be used for simple testing. Made PipingCalculationService responsible for its own logging. Moved resources related to logging of PipingCalculationService to Wti.Service project. Related to Issue [WTI-18]
* Added context menu to node presenter for collection of PipingSurfaceLines for import feature * Created skeleton of import feature ** Defined Reader, which is going to return read rows and interact with actual file. Related to Issue [WTI-20] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@253 5a3db67b-de53-47b5-99c8-a1c30a6650e2