Merge branch 'master' into master

CHANGELOG.md

examples/long_animation.sdf

package.json

src/mol-gl/shader/chunks/clip-instance.glsl.ts

src/mol-gl/shader/chunks/clip-pixel.glsl.ts

src/mol-gl/shader/chunks/common-clip.glsl.ts

src/mol-gl/shader/cylinders.frag.ts

src/mol-gl/shader/cylinders.vert.ts

src/mol-gl/shader/direct-volume.frag.ts

src/mol-gl/shader/spheres.frag.ts

src/mol-gl/shader/spheres.vert.ts

src/mol-model/sequence/alignment/sequence.ts

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

src/mol-plugin-state/animation/built-in/model-index.ts

src/mol-plugin-ui/sequence.tsx

src/mol-plugin-ui/sequence/sequence.tsx

src/mol-plugin-ui/structure/superposition.tsx