FlatArray
This crates contains the code for a cache-friendly datastructure named
FlatArray. It mimics the behavior of a Vec<Vec<T>> by allowing the
users to iterate over the vectors and can be dereferenced into a
&[T]. FlatArray is of fixed size but can be iterated over as if
it was a Vec<Vec<T>>, with the help of the iter_arrays and
iter_arrays_mut methods.