Vfo

Updates to mode shape plotter

-Updates to vtk plotter
-fix plot_deformedshape() for a single-step analysis.
-add missing fiber plotter data

Fixed fiber stress, strain plot and animation

v.0.0.4
Fixed plot_deformation() and plot_modeshape() procedure

v.0.0.3
Enhancement for displaying MVLEM3D, Tri 3D, tetrahedron elements.