Cold Fusion

This release adds two new visualizations: the stacked bar chart and the bubble chart. These visualizations were made using flexible visualization library Vega/Vega-Lite

New endpoints were created, most of which provide more details about activity on issues and pull requests. Some of these endpoints depend on a new data source "GHTorrentPlus" that requires write access to a database. The contributions endpoint is now much more performant. Batch requests are now possible.