- added new function tixiCloseAllDocuments() - improved mac build
- added new function tixiCloseAllDocuments()
- improved mac build

melven/tixi,melven/tixi,melven/tixi,DLR-SC/tixi,DLR-SC/tixi,DLR-SC/tixi,DLR-SC/tixi,melven/tixi,melven/tixi,DLR-SC/tixi