Plotly functionality

[ThierryBleau]

Now that plotly has an F# library (adapted to lambda function UX), integrating data visualization features should be rather straight forward.
Most functions would simply modify the existing predefined graph object represented by a record that is converted to json value to be returned by the sequence of plotting functions which could then be piped into a rendering function or automatically rendered on the frontend.

Most of the design effort should be focused in the smooth UX when combining pipe sequences and poly record arguments.

[ThierryBleau]

Below is a candidate for a minimal set of features for the MVP.

module Plotly = {
        // chart types
	scatter
	line
	column
	stacked_column
	candlestick
	histogram
	
	// layout
	x_style
	y_style
	line_style
	title
	marker
	combine
	trace_name
	legend
	layout
}