Those traits are not really removed since rust cannot handle those multiple operator overloading
very well yet, making them sometimes unuseable on generic code.
Traits like `AbsoluteRotate` and `RotationWithTranslation` have been moved to a `comp` folder
containing any trait providing operations which are combination of several traits.
CrossMatrix is a trait for vectors having a cross product representable as a matrix.
Row is a trait for Matrixces and Vectors, to access (by index) their rows.
The goal is to make traits less fine-grained for vectors, and reduce the amount of `use`.
- Scalar{Mul, Div} are removed, replaced by Mul<N, V> and Div<N, V>,
- Ring and DivisionRing are removed. Use Num instead.
- VectorSpace, Dot, and Norm are removed, replaced by the new, higher-level traits.
Add four traits:
- Vec: common operations on vectors. Replaces VectorSpace and Dot.
- AlgebraicVec: Vec + the old Norm trait.
- VecExt: Vec + every other traits vectors implement.
- AlgebraicVecExt: AlgebraicVec + VecExt.
Now, access to vector components are x, y, z, w, a, b, ... instead of at[i].
The method at(i) has the same (read only) effect as the old at[i].
Now, access to matrix components are m11, m12, ... instead of mij[offset(i, j)]...
The method at((i, j)) has the same effect as the old mij[offset(i, j)].
Automatic implementation of all traits the compiler supports has been added on the #[deriving]
clause for both matrices and vectors.
Column: to access a matrix column.
Homogeneous: to convert a matrix/vector from/to homogenous coordinates.
Indexable: to access a matrix/vector element using indices.
