title: Face pattern for boxes in boxplots
body: <p>I would like to do something of the sort (using matplotlib):
  <img src="https://i.stack.imgur.com/ThqdJ.png" alt="enter image description here"></p>
  
  <p>(from <a href="https://stackoverflow.com/questions/17423115/colorfill-boxplot-in-r-cran-with-lines-dots-or-similar">Colorfill boxplot in R-cran with lines, dots, or similar</a>) </p>
  
  <p>I saw some info about hatch(ing)? But I really can't make heads or tails on how to use this.</p>
  
  <p>Also I find myself wondering how can I change parameters like the possible attributes of a boxprop dict -- used in plt.boxplot(..., boxprops=boxpropsdict). Is it possible to just have a list of all the possible attributes for this?</p>