Merge branch 'master' into graphics

src/mol-model/location.ts

src/mol-model/loci.ts

src/mol-model/shape/shape.ts

src/mol-plugin/behavior/dynamic/volume-streaming/behavior.ts

src/mol-plugin/skin/base/components/temp.scss

src/mol-repr/shape/representation.ts

src/mol-repr/structure/visual/util/nucleotide.ts

src/mol-theme/color/shape-group.ts

src/mol-theme/label.ts

src/mol-theme/size/shape-group.ts

src/tests/browser/render-shape.ts