Preliminary submission - std.rational and std.typelist

[Andrej Mitrovic]

On 2/12/13, bearophile <bearophileHUGS at lycos.com> wrote:
>> Good luck compiling that with DMC on win32. And fixing bugs
>> upstream. :)
>
> For the first problem maybe using LLVM is a solution.

That doesn't help if we want to use DMD. As for the second part I
meant it's likely easier to fix bugs in BigInt than it is in GMP, GMP
is over 200 KLOC big.