Version 0.16.0

New features:

• VALUE_NODEs as low level blobs. Attribute entities now reference values and
  reuse stored blobs.

• Val(...) syntax in a GraphDelta will create a value node.

• Can load and save graphs locally.

Fixes:

• Graphs record which ET/RT/ENs they are using again.

• Issues with value nodes in graph caches.

Improvements:

• SimpleGQL:

  • Custom routes handled by hooks can be given as Zef.Route lines in the
    graphql file.

• Refactor GraphQL module from gql to graphql.

• Improvements to many FX.

• Improvements to many ZefOps.

• More flexible graph update process, allowing concurrent processing.

• Compact view for graphviz as default.

• Many improvements to FlatGraphs

Breaking changes:

• We have removed Windows support for this release. We are aiming to reintroduce
  it for the next release.