[Patch] First bits of the algo merge

[Gabriel Dos Reis]

Howard Hinnant <hhinnant@apple.com> writes:

| 1.  Get rid of it (probably deprecating first) but at the same time
| supply the equivalent functionality (e.g. bitvector).

Deprecation (which is different from removal) is almost never an effective
solution for C or C++, as far as I can see.  Since it is there, we
would have to support it.  It is an added complexity for no net benefit.

-- Gaby