add hbox kind of factorplot

I wanted to propose a feature, but i thought it might be interesting to propose a solution (even if i am not sure i made the best choice).

Using factorplot in boxplot mode usually involve categorical names that i feel better to present in horizontal mode (more space for labels, more place to view results).

The easiest way to add that features was to add a kind of plot. 
Tell me what do you think of that, and if you have already a solution that you are more comfortable with, i could try to help...