parse PDB assembly, various tweaks

src/apps/basic-wrapper/index.ts

src/mol-io/reader/cif/data-model.ts

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

src/mol-model-formats/structure/pdb/assembly.ts

src/mol-model-formats/structure/pdb/to-cif.ts

src/mol-plugin/state/transforms/model.ts

src/mol-plugin/ui/controls/parameters.tsx