Enable initial chart settings in the Angara.Charting.Chart type

[msdvoits]

Description

As an F# user of Angara.Chart library, I want to be able to

• explicitly define titles on both x and y axes,
• define visible rectangle in data coordinates,
• enable/disable logarithmic transformation for both or either of the axes,

so that when I create the chart I could determine initial chart appearance as well.

Example

let chart = 
    [ Plot.line(x, y); Plot.markers(x, z) ]
    |> Chart.ofList
    |> Chart.settings { VisibleRectangle = (0,0),(10,10); LogX = true; TitleX = "ms" }