auto merge of #570 : alexcrichton/cargo/fetch, r=brson
authorbors <bors@rust-lang.org>
Tue, 16 Sep 2014 23:33:21 +0000 (23:33 +0000)
committerbors <bors@rust-lang.org>
Tue, 16 Sep 2014 23:33:21 +0000 (23:33 +0000)
This command is used to download all dependencies of a package ahead of time to
ensure that no more network communication will be necessary as part of a build.

cc #358


Trivial merge