Merge branch 'master' into mol2-2

src/mol-data/_spec/equiv-index.spec.ts

src/mol-data/db/column.ts

src/mol-data/db/table.ts

src/mol-data/int.ts

src/mol-data/int/impl/ordered-set.ts

src/mol-data/int/map.ts

src/mol-data/iterator.ts

src/mol-data/util.ts

src/mol-data/util/array.ts

src/mol-data/util/chunked-array.ts

src/mol-data/util/equivalence-classes.ts

src/mol-data/util/grouping.ts

src/mol-data/util/hash-set.ts

src/mol-data/util/unique-array.ts

src/mol-io/common/binary-cif/array-encoder.ts

src/mol-io/writer/cif/encoder.ts

src/mol-math/geometry/symmetry-operator.ts

src/mol-math/linear-algebra/3d.ts

src/mol-model/structure/_spec/atom-set.spec.ts

src/mol-model/structure/model.ts