Added VolumeServer

docs/volume-server/README.md

docs/volume-server/examples.md

docs/volume-server/how-it-works.md

docs/volume-server/img/1tqn_downsampled.png

docs/volume-server/img/zika_downsampled.png

docs/volume-server/response-data-format.md

package-lock.json

package.json

src/apps/domain-annotation-server/mapping.ts

src/mol-app/ui/transform/spacefill.tsx

src/mol-io/writer/cif.ts

src/mol-io/writer/cif/encoder.ts

src/mol-io/writer/cif/encoder/binary.ts

src/mol-io/writer/cif/encoder/text.ts

src/mol-io/writer/encoder.ts

src/mol-io/writer/writer.ts

src/servers/volume/CHANGELOG.md

src/servers/volume/common/binary-schema.ts

src/servers/volume/common/data-format.ts

src/servers/volume/common/file.ts