Generic library for vectors with statically known
size. Implementation is based on
http://unlines.wordpress.com/2010/11/15/generics-for-small-fixed-size-vectors/
Same functions could be used to work with both ADT based vector like

`data Vec3 a = a a a`

Tuples are vectors too:

Vectors which are represented internally by arrays are provided by
library. Both boxed and unboxed arrays are supported.

Library is structured as follows:

Data.Vector.Fixed
Generic API. It's suitable for both ADT-based vector like Complex
and array-based ones.

Data.Vector.Fixed.Cont
Continuation based vectors. Internally all functions use them.

Data.Vector.Fixed.Mutable
Type classes for array-based implementation and API for working with
mutable state.

Data.Vector.Fixed.Unboxed
Unboxed vectors.

Data.Vector.Fixed.Boxed
Boxed vector which can hold elements of any type.

Data.Vector.Fixed.Storable
Unboxed vectors of Storable types.

Data.Vector.Fixed.Primitive
Unboxed vectors based on pritimive package.

Data.Vector.Fixed.Monomorphic
Wrappers for monomorphic vectors