auto merge of #939 : alexcrichton/cargo/issue-38, r=brson
authorbors <bors@rust-lang.org>
Mon, 24 Nov 2014 23:34:34 +0000 (23:34 +0000)
committerbors <bors@rust-lang.org>
Mon, 24 Nov 2014 23:34:34 +0000 (23:34 +0000)
This ensures that the registry understands whether dependencies are build
dependencies or dev dependencies.

Closes rust-lang/crates.io#38


Trivial merge