use relative path to make reading gadfly.js work if the package is installed outside of Julia's defaut package directory
use relative path to make reading gadfly.js work if the package is installed outside of Julia's defaut package directory

tbreloff/Gadfly.jl,spencerlyon2/Gadfly.jl,dcjones/Gadfly.jl,peter1000/Gadfly.jl,joehuchette/Gadfly.jl,mbauman/Gadfly.jl,zhmz90/Gadfly.jl,maximsch2/Gadfly.jl,Godisemo/Gadfly.jl,kshramt/Gadfly.jl,JuliaPackageMirrors/Gadfly.jl,jiahao/Gadfly.jl,Roger-luo/Gadfly.jl