create D3 representation from numeric columns: frontend

[DSLituiev]

For a table view:

1. create controls near the column names which allow to select a column for plotting as either x or y
2. add visualization button and space for the figure.
3. call API endpoint that delivers json data for the d3 figure

[ahirner]

There is an OS graphical table explorer in (node.)js and D3. https://github.com/cmpolis/datacomb
If it's easy to drop in with the other architecture choices, I propose to use it for immediate needs in sorting, grouping, filtering and ad-hoc scatter plots. Its standard styling is not really pretty though.