References
http://dcjones.github.io/Gadfly.jl/
https://github.com/stevengj/PyPlot.jl
http://johnmyleswhite.github.io/Vega.jl/
https://github.com/Evizero/UnicodePlots.jl
http://dcjones.github.io/Gadfly.jl/
https://github.com/stevengj/PyPlot.jl
http://johnmyleswhite.github.io/Vega.jl/
https://github.com/Evizero/UnicodePlots.jl