Quick update to the last rust-nightly.

This is just a quick-fix so that nalgebra compiles.
This does not fix the deprecation warnings!

Version of rustc: 0.13.0-nightly (d91a015ab 2014-11-14 23:37:27 +0000).
Use our own traits instead of the deprecated ones.

We might switch to bjz/num-rs eventually (#32), but in the mean time we just re-declare the
deprecrated traits in nalgebra.
Update to the last rust-nightly.

Version of rustc: 0.13.0-nightly (336349c93 2014-11-17 20:37:19 +0000).
Update to the last rust-nightly.

Version of rustc: 0.13.0-nightly (e09d98603 2014-11-18 23:51:43 +0000).
Add conversion from/to arrays for matrices and vectors.

Use `.as_array()`, `.as_array_mut()`, `.from_array_ref()`, `.from_array_mut()`.
Fix #33.
Fix erroneous Translate documentation

Looks like it's been copied & pasted without adapting.
Merge pull request #34 from aepsil0n/translate_doc

Fix erroneous Translate documentation
Have ToHomogeneous use &self in method signature

I find makes the syntax a bit lighter.
Merge pull request #35 from aepsil0n/to_homogeneous_self

Have ToHomogeneous use &self in method signature
Add metadatas for crates.io

cc #37.
Implement assertion macros for ApproxEq

These macros yield readable error messages as test assertions for ApproxEq
types. They can be invoked as:

    assert_approx_eq!(a, b);
    assert_approx_eq_eps!(a, b, eps);

Fixes #40.
Merge pull request #43 from aepsil0n/assert_approx_eq_macros

Implement assertion macros for ApproxEq
Make `from_array`-like methods static.

Fix #45.
Add float constants to `BaseFloat`.

Fix #42.
Replace the double dispatch trick by multidispatch!

Fix #38.
Merge pull request #49 from sebcrozet/multidispatch

Replace the double dispatch trick by multidispatch!
Do not mantion the double-dispatch on the doc.