Update __init__.py, abstractnode.py, animation.py, animation_parameters.py, axialrotation.py, beam3.py, cartesianscalarfunction.py, clamp.py, constitutivelaw.py, controldata.py, createworld.py, customview.py, customviews.py, deformabledisplacement.py, drive.py, drivehinge.py, dummybody.py, dummynode.py, dynamics.py, gear.py, genelclamp.py, gravity.py, info.py, InitGui.py, inline.py, inplane.py, LICENSE, mbdyn.py, MBdynGui.py, plot.py, plotabstract.py, pluginvariabledialog.py, polarscalarfunction.py, prismatic.py, README, revolutehinge.py, revolutepin.py, revoluterotation.py, rigidbody.py, sphericalhinge.py, structuralcouple.py, structuraldynamicnode.py, structuralforce.py, structuralstaticnode.py, tospreadsheet.py, totaljoint.py, totalpinjoint.py, userdefinedscalarfunction.py, viscousbody.py, writeinpfile.py