Register a blueprint document into the content-addressed store (#196)

Usage: aura graph register [OPTIONS] <FILE>

Arguments:
  <FILE>  The blueprint .json file to register

Options:
      --name <NAME>  Label the registered content id for `use` by name (#317); a re-registered label repoints (latest-wins on resolve)
      --release      Load the project dylib from target/release instead of target/debug
  -h, --help         Print help