Update to a more recent Rust + add a ball-vs-bezier-surface 3d demo.

Version of rustc:
0.11.0-pre-nightly (faa7ba7 2014-05-31 01:06:40 -0700)
Update to the last rust-nightly.

Version of rustc: 0.11.0-pre-nightly (918dbfe 2014-06-02 20:51:30 -0700).
Update to the last ncollide api.