new boundary conditions

source/VirtualFluidsCore/Utilities/VoxelMatrixUtil.hpp

...tualFluidsCore/Visitors/BoundaryConditionBlockVisitor.cpp

...ualFluidsCore/Visitors/BoundaryConditionsBlockVisitor.cpp

...rtualFluidsCore/Visitors/BoundaryConditionsBlockVisitor.h

...FluidsCore/Visitors/ChangeBoundaryDensityBlockVisitor.cpp

...alFluidsCore/Visitors/ChangeBoundaryDensityBlockVisitor.h

...re/Visitors/CoarsenCrossAndInsideGbObjectBlockVisitor.cpp

...Core/Visitors/CoarsenCrossAndInsideGbObjectBlockVisitor.h

source/VirtualFluidsCore/Visitors/ConnectorBlockVisitor.cpp

source/VirtualFluidsCore/Visitors/ConnectorBlockVisitor.h

...tualFluidsCore/Visitors/InitDistributionsBlockVisitor.cpp

...irtualFluidsCore/Visitors/InitDistributionsBlockVisitor.h

...dsCore/Visitors/InitDistributionsFromFileBlockVisitor.cpp

source/VirtualFluidsCore/Visitors/RenumberBlockVisitor.h

.../VirtualFluidsCore/Visitors/SetConnectorsBlockVisitor.cpp

...ce/VirtualFluidsCore/Visitors/SetConnectorsBlockVisitor.h

source/VirtualFluidsCore/Visitors/SetForcingBlockVisitor.h

...ualFluidsCore/Visitors/SetInterpolationDirsBlockVisitor.h

source/VirtualFluidsCore/Visitors/SetKernelBlockVisitor.cpp

source/VirtualFluidsCore/Visitors/SetKernelBlockVisitor.h