Vivainsights

Bug fixes and improve test coverage.

The new version adds a number of organizational network analysis (ONA) functions to the library:

- Network visualization and analysis:
- `network_g2g()`
- `network_p2p()`
- `network_summary()`
- `create_sankey()`
- Sample / simulate datasets:
- `p2p_data_sim()`
- `load_g2g_data()`
- `load_p2p_data()`

This is the first release of vivainsights. It includes the following features:

- Data visualization
- Data validation

The first version has been released to PyPi.