SBGAT V1.12.1

New:

• The gravity-gradient matrix deriving from the polyhedron gravity model can now be evaluated
• The evaluation of the surface polyhedron gravity model can now be saved to a JSON file through SBGATPolyhedronGravityModel::SaveSurfacePGM
• This static method is available in SbgatGUI as the evaluation of the PGM will now require the specification of an output file

Improvements

• Stronger typing of inputs in SBGATPolyhedronGravityModel
• SbgatGui will now ask users whethers a loaded shape should be barycentered/principal-axis aligned, and apply the corresponding transform if answered yes