What's Changed
* From scinode by superstar54 in https://github.com/scinode/node-graph/pull/1
* Copying nested dict when call node.set and node.to_dict by superstar54 in https://github.com/scinode/node-graph/pull/2
* Add a pool argument to the Collection by superstar54 in https://github.com/scinode/node-graph/pull/3
* add hook when creating/deleting data by superstar54 in https://github.com/scinode/node-graph/pull/4
* set default value of property to None by superstar54 in https://github.com/scinode/node-graph/pull/8
**Full Changelog**: https://github.com/scinode/node-graph/commits/0.0.8