First version with new system classes

Merge pull request #13 from molssi-seamm/system

Switching to the new system.

Bugfix: Nested loops failed in some cases

Merge pull request #12 from molssi-seamm/bugfix/nested_loops

Bugfix: infinite loop when describing nested loops

Write out the structure for each loop

Merge pull request #11 from molssi-seamm/viewing-structure

Viewing structure

Added plotting capabilities.

Consolidating a number of changes, but the noticeable user visible change is the addition of Plotly plots, which are currently used in LAMMPS.

End of 2019

This release contains the fixes for the "Cancel" button problem, wherein clicking Cancel did not update the GUI.

Yet another release

Fixed up the description and prepared for -- but not yet using -- PyUp.