Two functional tests for simulation with roi and masks

Core/Instrument/DetectorMask.cpp

Core/Instrument/IDetector2D.h

Core/Simulation/GISASSimulation.cpp

Core/Simulation/GISASSimulation.h

Core/StandardSamples/SimulationFactory.cpp

Core/StandardSamples/StandardSimulations.cpp

Core/StandardSamples/StandardSimulations.h

Tests/Functional/Core/CMakeLists.txt

.../Functional/TestMachinery/StandardSimulationsRegistry.cpp

Tests/ReferenceData/StandardSuite/RectDetWithRoi.int.gz

Tests/ReferenceData/StandardSuite/SphericalDetWithRoi.int.gz

auto/Wrap/libBornAgainCore.py

auto/Wrap/libBornAgainCore_wrap.cpp