Merge pull request #181 from molstar/spin-struct-anim

CHANGELOG.md

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

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

src/mol-plugin-state/animation/built-in/spin-structure.ts

src/mol-plugin-state/animation/helpers.ts

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

src/mol-plugin/spec.ts