Fix method error in table.jl
Fix method error in table.jl

Fixes problem with the following plot on Julia v1.0.0.  Otherwise I get
`ERROR: MethodError: no method matching +(::Array{Float64,1}, ::Float64)`
```
plot(
    layer(x=[-2.5, 2.5, 2.25, 2.5, 2.25],y=[0, 0, 0.15, 0 ,-0.15],
        Geom.line(preserve_order=true)),
        Coord.cartesian(aspect_ratio=MathConstants.golden)
 )
```
dcjones/Compose.jl