Merge pull request #692 from molstar/misc2

CHANGELOG.md

src/mol-gl/renderable/util.ts

src/mol-gl/scene.ts

src/mol-math/geometry/boundary-helper.ts

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

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

src/mol-repr/representation.ts

src/mol-repr/structure/registry.ts

src/mol-repr/structure/units-representation.ts

src/mol-theme/theme.ts