refactoring, bug fixes and working on queries

src/mol-base/collections/integer/_spec/interval.spec.ts

src/mol-base/collections/integer/_spec/segmentation.spec.ts

src/mol-base/collections/integer/impl/interval.ts

src/mol-base/collections/integer/impl/segmentation.ts

src/mol-data/structure.ts

src/mol-data/structure/model.ts

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

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

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

src/mol-data/structure/model/properties/hierarchy.ts

src/mol-data/structure/query.ts

src/mol-data/structure/query/generators.ts

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

src/mol-data/structure/structure/structure.ts

src/mol-io/reader/cif.ts

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

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

src/perf-tests/structure.ts

src/script.ts