add the plot_title

src/pipeline.jl

@@ -262,6 +262,7 @@ function _subplot_setup(plt::Plot, plotattributes::AKW, kw_list::Vector{KW})
         sp_attrs[sp] = attr
     end
 
+    _add_plot_title!(plt)
     # override subplot/axis args.  `sp_attrs` take precendence
     for (idx, sp) in enumerate(plt.subplots)
         attr = if !haskey(plotattributes, :subplot) || plotattributes[:subplot] == idx
@@ -274,12 +275,29 @@ function _subplot_setup(plt::Plot, plotattributes::AKW, kw_list::Vector{KW})
 
     # do we need to link any axes together?
     link_axes!(plt.layout, plt[:link])
+    return nothing
 end
 
 function series_idx(kw_list::AVec{KW}, kw::AKW)
     Int(kw[:series_plotindex]) - Int(kw_list[1][:series_plotindex]) + 1
 end
 
+function _add_plot_title!(plt)
+    plot_title = plt[:plot_title]
+    if plot_title != ""
+        the_layout = plt.layout
+        plt.layout = grid(2,1, heights = [0.0,1.0])
+        plt.layout.grid[2,1] = the_layout
+        subplot = Subplot(backend(), parent = plt.layout[1,1])
+        subplot.plt = plt
+        subplot[:title] = plot_title
+        subplot[:subplot_index] = last(plt.subplots)[:subplot_index] + 1
+        subplot[:framestyle] = :none
+        plt.layout.grid[1,1] = subplot
+        push!(plt.subplots, subplot)
+    end
+    return nothing
+end
 
 ## Series recipes