wip, visual .mark and .getLoci

src/mol-data/int/impl/interval.ts

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

src/mol-data/int/impl/sorted-array.ts

src/mol-data/int/interval.ts

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

src/mol-data/int/sorted-array.ts

...esentation/structure/visual/carbohydrate-link-cylinder.ts

...presentation/structure/visual/carbohydrate-symbol-mesh.ts

...presentation/structure/visual/intra-unit-link-cylinder.ts

.../representation/structure/visual/nucleotide-block-mesh.ts

...resentation/structure/visual/polymer-backbone-cylinder.ts

...o/representation/structure/visual/polymer-gap-cylinder.ts

...ol-geo/representation/structure/visual/util/nucleotide.ts

src/mol-geo/representation/structure/visual/util/polymer.ts

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

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