Added spacegroups to mol-model

data/mmcif-field-names.csv

src/mol-io/reader/cif/schema/mmcif.ts

src/mol-math/geometry/spacegroup/construction.ts

src/mol-math/geometry/spacegroup/tables.ts

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

src/mol-math/linear-algebra/3d/mat4.ts

src/mol-model/structure/model.ts

src/mol-model/structure/model/formats/gro.ts

src/mol-model/structure/model/formats/mmcif.ts

src/mol-model/structure/model/formats/mmcif/sequence.ts

src/mol-model/structure/model/model.ts

src/mol-model/structure/model/properties/atomic.ts

src/mol-model/structure/model/properties/symmetry.ts

src/mol-model/structure/model/utils/hierarchy-keys.ts

src/mol-model/structure/query/properties.ts

src/mol-model/structure/structure/symmetry.ts

src/perf-tests/structure.ts