this allows errors in parsed .fem files to now provide useful errors back to the user.
also stitched in the incomplete functions for the buttons that existed already but has no implementations.
- new doc
- save/as
- zoom
- grid
- etc
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animations:
new engine for defining the movement of a segment between two nodes or multiple pairs of two as a function over time
and animated simulations are now capable showing the change in fields of moving objects.
Jess