Merge pull request #730 from rust-lang/cargo/0.4.32

Prepare for 0.4.32 release

Merge pull request #728 from rust-lang/cargo/0.4.31

Prepare for 0.4.31 release

Merge pull request #725 from rust-lang/cargo/0.4.30

Prepare for 0.4.30 release

Merge pull request #719 from rust-lang/cargo/0.4.29

Prepare for 0.4.29 release

Merge pull request #695 from rust-lang/cargo/0.4.28

Prepare for 0.4.28 release

Merge pull request #674 from rust-lang/cargo/0.4.27

Prepare for 0.4.27 release

Merge pull request #670 from rust-lang/cargo/0.4.26

Prepare for 0.4.26 release

Merge pull request #663 from rust-lang/cargo/0.4.25

Prepare for 0.4.25 release

Merge pull request #660 from rust-lang/cargo/0.4.24

Prepare for 0.4.24 release

Merge pull request #656 from rust-lang/cargo/0.4.23

Prepare for 0.4.23 release