Update to the last Rust.
Update to the last Rust.

Version of rustc: 0.11-pre (ce2bab6 2014-04-18 04:11:19 -0700)

steveklabnik/ncollide,MichaelRiss/ncollide,sebcrozet/ncollide,MichaelRiss/ncollide,sebcrozet/ncollide,steveklabnik/ncollide