Feature Request: MarkerCluster Pie Charts and Bar Charts

[ngfrey]

It would be wonderful if it was easy to replicate the example from gisminister linked below, but also specify colors to the pie-charts via either a pal function, a vector of colors, or a dataframe of key-value stores.

Leaflet Pie Chart Markers Example: http://bl.ocks.org/gisminister/10001728

Likewise, it would be wonderful to also have bar charts, as shown in leaflet.minicharts. Example here : https://cran.r-project.org/web/packages/leaflet.minicharts/vignettes/introduction.html