Fix text vertical alignment in cairo backend. Fixes #68.
Fix text vertical alignment in cairo backend. Fixes #68.

Small mistake in the default case.

dcjones/Compose.jl,tkelman/Compose.jl,Hydrotoast/Compose.jl,yuyichao/Compose.jl,jiahao/Compose.jl,rened/Compose.jl,darwindarak/Compose.jl,JuliaPackageMirrors/Compose.jl,glesica/Compose.jl