Spec for AO::Gaussian::Primitive cenverd on an Atom
AO::Gaussian::Primitive.new accepts an Atom as a center
Scaffold of MO::Basis::LCAO#shells
RuPHY::Math::Matrix#diagonal_elements
Define all_be_within matcher
Spec for BasisSet::LCAO::Gaussian#shells
Initialize shells in MO::Basis::LCAO
Fix rspec label
Implement Mo::Basis::LCAO#shells
Specs for MO::Basis::LCAO#overlap
Define MO::Basis::LCAO#aos