MOPAC version 22.0.1

This patch release adds the post-release Zenodo DOI information to the repo, fixes some minor CMake-related build and install problems, and adds features to the Qt installer. The Qt installer can now add MOPAC to the path during installation on all platforms, create a MOPAC Windows desktop icon for drag-and-drop running of MOPAC input files, and/or register .mop input files to run on double-click in Windows.

MOPAC version 22.0.0

This is the first modern open-source release of MOPAC, which is a direct continuation of MOPAC's closed-source commercial development ending in MOPAC2016. The source of the two versions has been synchronized for the last year, with the differences either being superficial (reorganization of source into directories & LGPL license tagging) or minor (redefined API to accommodate the switch to a shared library). The open-source version contains a CMake build system with packaging of self-contained, cross-platform installers based on the Qt Installer Framework.