Graphistry

Added

* Layout: `circle_layout()` that moves points to one or more rings based on an ordinal field such as degree
* Layout: `fa2_layout()` that uses the ForceAtlas2 algorithm to lay out the graph, with some extensions.
* Layout: `group_in_a_box_layout()` is significantly faster in CPU and GPU mode
* Layout: `group_in_a_box_layout()` exposes attribute `_partition_offsets`
* Compute methods `g.to_pandas()` and `g.to_cudf()`

Fix

* cugraph methods now handle numerically-typed node/edge index columns
* repeat calls to `fa2_layout` and `group_in_a_box_layout` now work as expected

Docs

* Add group-in-a-box layout tutorial

Infra

* Expose `scene_settings` in `Plottable`

Docs

* Update and streamline readme.md
* Add quicksheet for overall
* More crosslinking

Infra

* Add markdown support to docsite
* ReadTheDocs homepage reuses github README.md
* Docs pip install caches
* Drop SVGs and external images during latexpdf generation

Changed

* Treemap import `squarify` deferred to use to allow core import without squarify installed, such as in `--no-deps`

Docs

* Improve GFQL translation doc
* Add examples and API links: Shaping, Hypergraphs, AI & ML
* Add performance docs
* Add AI examples

Added

* HTTP responses with error status codes log an `logging.ERROR`-level message of the status code and response body

Docs

* Add more GFQL cross-references

Docs

* Fix ipynb examples in ReadTheDocs distribution