Merge remote-tracking branch 'origin/master'

extras/newton_method.ipynb

extras/pullout1d.ipynb

index.ipynb

pull_out/2_2_1_PO_configuration_explorer.ipynb

pull_out/2_2_2_PO_ELF_ELM.ipynb

pull_out/2_2_3_PO_ESF_RM.ipynb

pull_out/fragmentation.ipynb

pull_out/pull_out.ipynb

tour2_constant_bond/2_1_1_PO_observation.ipynb

tour2_constant_bond/2_2_1_PO_configuration_explorer.ipynb

tour2_constant_bond/fragmentation.ipynb

tour3_nonlinear_bond/3_1_nonlinear_bond.ipynb

tour3_nonlinear_bond/3_2_anchorage_length.ipynb

tour4_plastic_bond/4_1_PO_multilinear_unloading.ipynb

tour4_plastic_bond/4_2_BS_EP_SH_I_A.ipynb