Gankro/collect-rs — pull request #17 by Gankro (2014-12-14 02:31:09+00:00)
Title: prototype internal iterators on blist

```
test blist::bench::bench_iter ... bench: 1050 ns/iter (+/- 140)
test blist::bench::bench_trav ... bench: 240 ns/iter (+/- 18)
```

GG internal iterators

CC @reem @cgaebel @aturon