Node-graph

What's Changed
* Add SocketNamespace by superstar54 in https://github.com/scinode/node-graph/pull/20


**Full Changelog**: https://github.com/scinode/node-graph/compare/v0.0.20...v0.1.0

What's Changed
* rename `nt` to `ng`, add `_executor` attribute by superstar54 in https://github.com/scinode/node-graph/pull/19


**Full Changelog**: https://github.com/scinode/node-graph/compare/v0.0.19...v0.0.20

What's Changed
* Refactor node data, do not pickle node_class, create the node on the fly by superstar54 in https://github.com/scinode/node-graph/pull/18


**Full Changelog**: https://github.com/scinode/node-graph/compare/v0.0.18...v0.0.19

What's Changed
* Refactor property, avoid duplicate by superstar54 in https://github.com/scinode/node-graph/pull/17


**Full Changelog**: https://github.com/scinode/node-graph/compare/v0.0.17...v0.0.18

What's Changed
* Allow using type mapping from plugin by superstar54 in https://github.com/scinode/node-graph/pull/16


**Full Changelog**: https://github.com/scinode/node-graph/compare/v0.0.16...v0.0.17

Fix:
[Avoid deepcoping of the node data](https://github.com/scinode/node-graph/commit/33c131f7adb7a1f63f2cae0b9702538579d8a74e)

**Full Changelog**: https://github.com/scinode/node-graph/compare/v0.0.15...v0.0.16