Fix delete! usage so that BinDeps works on all v0.2-pre versions of julia
Fix delete! usage so that BinDeps works on all v0.2-pre versions of julia

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