Remove code paths for julia < 0.3
Remove code paths for julia < 0.3

as julia 0.3 is now REQUIRE'd by BinDeps

JuliaPackageMirrors/BinDeps.jl,chezou/BinDeps.jl,andrewcooke/BinDeps.jl,tlycken/BinDeps.jl,tkelman/BinDeps.jl