Investigate a read-through storage operator

[mbossenbroek]

It would be nice to have a storage operator that would return the data as well. Something that would allow debugging of a script without breaking it into smaller pieces.

(->> (p/load-clj "inp.clj")
        (p/map inc)
        (p/store-and-return-clj "inc.clj")
        (p/map #(* % 2))
        (p/store-and-return-clj "double.clj")
        (p/map #(* % 3)))