Reevaluate the usefulness of furculas

[rplevy]

The furcula macros seem to be unnecessary because anything that could be done with them could be done with more idiomatic expressions.

the macros in question include:

-< , -<:p The Furcula, Parallel Furcula

-<< , -<<:p The Trystero Furcula, Parallel Trystero Furcula

-<>< , -<><:p The Diamond Fishing Rod, Parallel Diamond Fishing Rod

1. Confirm the equivalence of the behavior of these macros with more idiomatic expressions.

   For example, a call to

         (-< (+ 1 2)
                 (list 2)
                 (list 3)
                 (list 4)))
   

   Should produce the same value as

   (map (fn [x] (list (+ 1 2) (first x))) [(list 1) (list 2) (list 3)])
   

   • Write test that demonstrate more idiomatic expressions can accomplish results.

   • Compare the output with the result of the expression that is supposed to produce the same value

2. If the tests pass, then mark the macros as deprecated