psi4/psi4numpy: v0.3-beta

Psi4NumPy is an interactive quantum chemistry framework for development and education. By leveraging the Psi4 program, integrals and quantities important to quantum chemistry are obtained and then manipulated or contracted using the Numerical Python (NumPy) package. In this way, quantum chemistry can be programmed quickly and concisely while still maintaining a relatively low execution time. A series of short scripts are provided that demonstrate how a user would implement the following methods: Self-Consistent Field (SCF), SCF Response, Moller-Plesset Theory, Coupled-Cluster, Symmetry-Adapted Perturbation Theory, and more. Walkthroughs of quantum chemistry methods detailing both their theory and implementation are shown in order to provide an educational framework for both novice and expert users in the field. Overall, this project aims to remove the gap between theory and implementation. As such, user-submitted scripts and modifications are welcome in order to make a better Psi4NumPy experience for the entire quantum chemistry community. As a note, Psi4NumPy is a constantly evolving framework. Please seek github.com/psi4/psi4numpy for the latest version of the code