Dtale

* added pie, 3D scatter & surface charts
* updated popups to be displayed when the browser dimensions are too small to host a modal
* removed Swagger due to its lack up support for updated dependencies

* redesign of charts popup to use plotly/dash
* [55](https://github.com/man-group/dtale/issues/55): raise exception when data contains duplicate column names
* heatmap integration
* combination of "_main.jsx" files into one for spacial optimization
* [15](https://github.com/man-group/dtale/issues/15): made arctic an "extra" dependency

* better front-end handling of dates for charting as to avoid timezone issues
* the ability to switch between sorting any axis in bar charts

* bugfix for timezone issue around passing date filters to server for scatter charts in correlations popup

* additional information about how to use Correlations popup
* handling of all-nan data in charts popup
* styling issues on popups (especially Histogram)
* removed auto-filtering on correlation popup
* scatter point color change
* added chart icon to cell that has been selected in correlation popup
* responsiveness to scatter charts
* handling of links to 'main','iframe' & 'popup' missing data_id
* handling of 'inf' values when getting min/max & describe data
* added header to window popups (correlations, charts, ...) and a link back to the grid
* added egg building to cirleci script
* correlation timeseries chart hover line

* [50](https://github.com/man-group/dtale/issues/50): updates to rolling correlation functionality