Filter style keywords according to backend #802
In the last commit, I skip filtering if
The assumption is that things like
Is this assumption reasonable?
In the future, in cases where multiple backends use the same keyword to mean different things, should we support adding an identifier to specify the backend? E.g. 'bokeh:linewidth=5" or "mpl:linewidth=10"? This could also be used if we wanted to customize the two plots separately, e.g. to choose one color that looks good against mpl's default gray background, and a different color for Bokeh...