Austin

Add documentation for using popups

Letters in textbox appear shifted upwards if they have a tail

1

Letters such as g, p, q, y, p, j appear above the other letters

Updating for compatibility with NumPy >= 2.0

1

With NumPy >= 2.0, some files raise the following error: AttributeError: `np.mat` was removed in the NumPy 2.0 release. Use `np.asmatrix` instead. For example, in MJ_solar_cell_tutorial. This should be fixed...