Hetnets in Python: hetio v0.1.0 initial release

This is the first release of hetio for hetnets in Python.

Currently, the following features are supported:

• creating a hetnet consisting of a metagraph (types) and a graph (nodes and edges)
• metanode and metaedge abbreviations
• node and edge properties using the data attribute
• node and edge masking
• writing and reading hetnets
• summary statistics
• summary visualizations
• metapath extraction from the metagraph
• graph traversal to extract paths
• feature computation, specifically DWPCs

The following features are not currently supported:

• node or edge deletion
• network permutation (edge swaps)

Documentation is lacking, but see these examples of network creation and feature extraction.