V4 chart studio updates (#1621)

* Rewrite `plotly.plotly.plot` to remove use of the v1 chart studio API. Remove fileopt argument
* Use IPython.display.IFrame to remove deprecation warning
when displaying figure in the Jupyter notebook using
`chart_studio.plotly.iplot`

Author: jonmmease

packages/python/chart-studio/CHANGELOG.md

@@ -0,0 +1,18 @@
+# Change Log
+All notable changes to this project will be documented in this file.
+This project adheres to [Semantic Versioning](http://semver.org/).
+
+## [1.0.0] - ???
+
+The initial release of the stand-alone `chart-studio` package.  This package contains utilities for interfacing with Plotly's Chart Studio service (both Chart Studio cloud and Chart Studio On-Prem).  Prior to plotly.py version 4, This functionality was included in the `plotly` package under the `plotly.plotly` module. As part of plotly.py version 4, the Chart Studio functionality was removed from the `plotly` package and released in this `chart-studio` package.
+
+
+### Updated
+ - The `chart_studio.plotly.plot`/`iplot` functions have been ported to the Chart Studio [v2 API](https://api.plot.ly/v2/).
+ - The `chart_studio.plotly.plot`/`iplot` functions now support uploading figures that contain frames. This makes the legacy `chart_studio.plotly.create_animations`/`icreate_animations` functions unnecessary, though they are still included for backward compatibility.
+
+### Fixed
+ - Fixed iframe warning resulting from `chart_studio.plotly.iplot`  
+ 
+### Removed
+ - The `fileopt` argument to `chart_studio.plotly.plot`/`iplot` was deprecated in plotly.py version 3.9.0 and has been removed in this initial release of the `chart-studio` package.

packages/python/chart-studio/README.md

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-Package for interfacing with the plotly's Chart Studio
+# chart-studio
+This package contains utilities for interfacing with Plotly's Chart Studio service (both Chart Studio cloud and Chart Studio On-Prem).  Prior to plotly.py version 4, This functionality was included in the `plotly` package under the `plotly.plotly` module. As part of plotly.py version 4, the Chart Studio functionality was removed from the `plotly` package and released in this `chart-studio` package.