Re: Arraymancer and --gc:arc

[xflywind]

I write some naive fft function use Arraymancer.But I don't have time to 
improve.(i'm writting web framework now)

[https://github.com/xflywind/scim/blob/master/src/scim/fft.nim](https://github.com/xflywind/scim/blob/master/src/scim/fft.nim)