User documentation for the HQS Spin Mapper

This is the user documentation for the HQS Spin Mapper package. The intended purpose of HQS Spin Mapper is the investigation of first-principles Hamiltonian descriptions of an input material (this includes both solids and molecules) for orbitals of spin-like character and the subsequent derivation of an effective model Hamiltonian description for this material as a spin-bath model, i.e. a system of spins embedded in a material-specific fermionic bath.