Add object dragging in 2D testbed
Merge pull request #13 from BenBergman/drag2d

Add object dragging in 2D testbed
Add the ability to use features with nphysics (just like ncollide).

This allows the user of nphysics to do (for example for 3d f32):

[dependencies.nphysics]
features = [ "3df32" ]
git = "https://github.com/sebcrozet/nphysics"

instead of:

[dependencies.nphysics3df32]
git = "https://github.com/sebcrozet/nphysics"
Workaround for issue #14.
Method got renamed: mut_iter -> iter_mut
Merge pull request #15 from jansegre/master

Updates for nightly rust
Update to the last ncollide API.
Update to the last rust-nightly.

Version of rustc: 0.13.0-nightly (221fc1e3c 2014-10-31 02:27:15 +0000).
Update to the last ncollide api.
Update to the last ncollide API.
Update to the last rust-nightly.
Re-enable the mesh-related demos.

They do not cause an ICE any more.
Fix travis.yml.
Update to the last ncollide API.
Examples: remove a lot of useless type anotations.

Most `f32` suffixes are useless because the compiler infers them.
Rename the `examples2d` and `examples3d` directories to `examples2` and `examples3`.

This is so to reflect the way types are suffixed (i-e without the 'd' letter).
Update to the last ncollide API.
Fix CCD.

It was broken for a long time!
Update to the last ncollide API.
Add point-related queries and us them with the 2D testbed to grab objects.