Remove double reference CountedVector / DD

[matbesancon]

mutable struct DoubleDescription{T<:Real,C}
    A::Matrix{T}
    R::Vector{C}
    K::Set{Int}
    adj::Dict{Tuple{Int,Int},Bool}
    num_rays::Int
end

mutable struct CountedVector{T<:Real,C}
    v::Vector{T}
    Av::Vector{T}
    dd::DoubleDescription{T,C}
    id::Int

    function CountedVector{T}(v::Vector{T}, dd::DoubleDescription{T,C}) where {T,C}
        dd.num_rays += 1
        canonicalize!(v)
        new{T,C}(v, dd.A*v, dd, dd.num_rays)
    end
end

One should be able to restructure things to avoid double references

[blegat]

Closed by #16?

[matbesancon]

I'll check today, I think so