auto merge of #722 : blaenk/cargo/rpath-docs, r=alexcrichton
authorbors <bors@rust-lang.org>
Mon, 20 Oct 2014 05:14:53 +0000 (05:14 +0000)
committerbors <bors@rust-lang.org>
Mon, 20 Oct 2014 05:14:53 +0000 (05:14 +0000)
The `rpath` option was added (awesome!) but not documented.


Trivial merge