Trevor Lyon

Replaces [WebIO.jl](https://github.com/JuliaGizmos/WebIO.jl) based `display.jl` with [JSServe.jl](https://github.com/SimonDanisch/JSServe.jl)

Images only show on first facet

6

When using `facet_col`, images added to the layout only are put in the first facet: ```julia using PlotlyJS, CSV, DataFrames df = dataset(DataFrame, "iris") sources = [ "https://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Iris_setosa_var._setosa_%282595031014%29.jpg/360px-Iris_setosa_var._setosa_%282595031014%29.jpg", "https://upload.wikimedia.org/wikipedia/commons/thumb/3/38/Iris_versicolor_quebec_1.jpg/320px-Iris_versicolor_quebec_1.jpg", "https://upload.wikimedia.org/wikipedia/commons/thumb/f/f8/Iris_virginica_2.jpg/480px-Iris_virginica_2.jpg",...