Auto merge of #2772 - knight42:patch, r=alexcrichton
authorbors <bors@rust-lang.org>
Mon, 6 Jun 2016 09:16:38 +0000 (02:16 -0700)
committerbors <bors@rust-lang.org>
Mon, 6 Jun 2016 09:16:38 +0000 (02:16 -0700)
Improve autocompletion

1. Add path completion to manifest-path options
2. Support subcommand metadata


Trivial merge