Added

• openmp parallelization when computing correlation and cluster interaction vectors. #338 @lbluque
• stochastic SQS generation functionality. #344 @lbluque
• enumeration of symmetrically distinct supercell matrices. #344 @lbluque

Fixed

• Fix #334 getting subclasses of non-abstract classes. #335 @lbluque
• Fix #353 appending in Sublattice.restricted_sites property. #355 @qchempku2017
• Use jsanitize to serialize dicts/lists of msonables. #354 @lbluque
• Use site_mappings in StructureWrangler.process_entry. #363 @lbluque