Added 3 datasets

examples/Sea_Urchin/CordatumShell_3D_Example.jpg

examples/Sea_Urchin/CordatumShell_3D_Example1.jpg

examples/Sea_Urchin/CordatumSpine_3D_Example.jpg

examples/Sea_Urchin/EsculentesSpineShell_3D_Example.jpg

examples/Sea_Urchin/cordatumSpine_3d_1.png

examples/Sea_Urchin/histogram.png

examples/Sea_Urchin/histogram_cordatum_shell.png

examples/Sea_Urchin/histogram_cordatum_spine.png

examples/Sea_Urchin/orthogonal_slices.png

examples/Sea_Urchin/same_direction.png

examples/Sea_Urchin/seaUrchin_3d_1.png

examples/Sea_Urchin/seaUrchin_3d_2.png

examples/Sea_Urchin/single_view_1.png

examples/Sea_Urchin/single_view_cordatum_shell.png

examples/Sea_Urchin/single_view_cordatum_spine.png

examples/Sea_Urchin/single_view_x.png

examples/Sea_Urchin/single_view_y.png

examples/Sea_Urchin/single_view_z.png

examples/Snail/Escargot_Example.png

examples/Snail/escargot_3d_1.png