Update needed for MATLAB data analysis toolbox after VTK Update from June 2, 2021

[nickabattista]

The Data Analysis toolbox needs to update some of the "read in" VTK scripts to account for the update to how VTK data is now stored with time information since there is more header information in each .vtk file.

I will fix this by the end of the week (7/16/21).

[nickabattista]

This issue was fixed and modified scripts were pushed to the master branch (on 7/13/21); keeping the issue open in case there are any additional errors.