First version of functional tests for form factors

App/inc/TestFormFactors.h

App/src/TestFormFactors.cpp

Core/FormFactors/inc/FormFactorBox.h

Core/FormFactors/inc/FormFactorFullSpheroid.h

Core/FormFactors/inc/FormFactors.h

Core/FormFactors/src/FormFactorFullSpheroid.cpp

Tests/FunctionalTests/TestCore/CMakeLists.txt

...FunctionalTests/TestCore/FormFactors/FTestFormFactors.cpp

...s/FunctionalTests/TestCore/FormFactors/FTestFormFactors.h

Tests/ReferenceData/BornAgain/isgi_reference_box_BA.ima.gz

Tests/ReferenceData/BornAgain/isgi_reference_cone6_BA.ima.gz

Tests/ReferenceData/BornAgain/isgi_reference_cone_BA.ima.gz

...ReferenceData/BornAgain/isgi_reference_cylinder_BA.ima.gz

...erenceData/BornAgain/isgi_reference_full_sphere_BA.ima.gz

...nceData/BornAgain/isgi_reference_parallelepiped_BA.ima.gz

...s/ReferenceData/BornAgain/isgi_reference_prism3_BA.ima.gz

...s/ReferenceData/BornAgain/isgi_reference_prism6_BA.ima.gz

.../ReferenceData/BornAgain/isgi_reference_pyramid_BA.ima.gz

...s/ReferenceData/BornAgain/isgi_reference_sphere_BA.ima.gz

...erenceData/BornAgain/isgi_reference_tetrahedron_BA.ima.gz