mol-canvas3d: refacroring, moved now() to mol-util

src/apps/canvas/app.ts

src/apps/canvas/component/representation.tsx

src/apps/canvas/structure-view.ts

src/apps/canvas/volume-view.ts

src/examples/task.ts

src/mol-canvas3d/camera.ts

src/mol-canvas3d/canvas3d.ts

src/mol-canvas3d/controls/trackball.ts

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

src/mol-plugin/context.ts

src/mol-task/execution/observable.ts

src/mol-task/index.ts

src/mol-task/util/chunked.ts

src/mol-util/now.ts

src/mol-util/performance-monitor.ts

src/mol-util/uuid.ts

src/perf-tests/tasks.ts

src/servers/model/preprocess/parallel.ts

src/servers/model/server/api-local.ts

src/servers/model/server/query.ts