mv IShape -> IShape3D to facilitate analysis

Sample/Scattering/IBornFF.cpp

Sample/Scattering/IBornFF.h

Sample/Shapes/Box.h

Sample/Shapes/DoubleEllipse.h

Sample/Shapes/IShape3D.cpp

Sample/Shapes/IShape3D.h

Sample/Shapes/RippleCosine.cpp

Sample/Shapes/RippleCosine.h

Sample/Shapes/RippleSawtooth.h

Sample/Shapes/TruncatedEllipsoid.cpp

Sample/Shapes/TruncatedEllipsoid.h

auto/Wrap/doxygenSample.i

auto/Wrap/libBornAgainSample_wrap.cpp

auto/Wrap/libBornAgainSample_wrap.h