dependencies some wrong

[xianghx]

First , enter https://crates.io/crates/futures-cpupool
Dependencies
futures ^0.1
num_cpus ^1.0

hit futures ^0.1, enter https://crates.io/crates/futures
and then press <-- history back:

https://crates.io/crates/futures-cpupool
Dependencies
futures-cpupool ^0.1 ------------------>> wrong here
num_cpus ^1.0

hit num_cpus ^1.0 and then history back:
https://crates.io/crates/futures-cpupool
Dependencies
futures-cpupool ^0.1

[carols10cents]

Yup, this is a duplicate of #306. Thanks!