auto merge of #420 : alexcrichton/cargo/issue-393-2, r=brson
authorbors <bors@rust-lang.org>
Wed, 27 Aug 2014 01:40:01 +0000 (01:40 +0000)
committerbors <bors@rust-lang.org>
Wed, 27 Aug 2014 01:40:01 +0000 (01:40 +0000)
This commit removes all distributed executables except for `cargo`. All
builtin subcommands are implemented through library calls, and the fallback
methods are retained to maintain extensability through new subcommands.

Closes #393


Trivial merge