>> include RenderGraphs
=> Object
>> render_standard_curve_graph(standard_curve, standard_curve_params)
NameError: uninitialized constant Gnuplot
        from /Users/tim/projects/yuzu/src/lib/render_graphs.rb:5:in `render_standard_curve_graph'
        from (irb):5
>> require 'gnuplot'
=> nil
>> render_standard_curve_graph(standard_curve, standard_curve_params)
NameError: uninitialized constant Gnuplot
        from /Users/tim/projects/yuzu/src/lib/render_graphs.rb:5:in `render_standard_curve_graph'
        from (irb):7