Merge branch 'add/shear_force_diagram'

automated_curved_beam_lineload.py

automated_square_plate.py

curved_beam_shear.eps

curved_beam_shear_href.eps

element_stiff_matrix.py

eps_gnuplot_automated.py

global_stiff_matrix.py

post_process_curvedbm.py

post_process_sqplate.py

ref_data_href_nel.eps

surface_geom_SEM.py