Mopac-step

Latest version: v2025.3.6

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2023.7.26

* Also added capability to use the bond orders to put bond multiplicities on the
structure.

2023.7.24

* Major issue in getting the bonds from the Lewis structure where the atoms and bond
orders were mixed up.

2023.6.5

* MOPAC is not consistent about putting end of file and end of program markers in the
AUX file. This caused carashed in SEAMM, which this fixes until MOPAC can be
corrected.

2023.4.24

* Correctly handle periodic systems in Lewis structure.
* Fixed and issue with the Lewis structure GUI not displaying all the widgets.

2023.3.31

Lewis structure could reference a variable before it was set, and crash.

2023.3.15

A copy of the input and output files for MOPAC was inadvertently written to the main
job directory. This has been fixed.

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