icons added

fig/fiber_bundle.odg

fig/fiber_bundle.png

fig/fiber_bundle_carbon_tensile_test.png

fig/interface_2d.odg

fig/interface_2d.png

fig/yarn3d.png

icons/classify.png

icons/recall.png

papers/yarn_tensile_test_example.pdf

...d/5_1_Introspect_Damage_Evolution_Damage_initiation.ipynb

tour5_damage_bond/damage2d_explorer.py