Randomization of networks

Randomization of networks is mostly used to perform null hypothesis significance testing, or to draw random realizations of a probabilistic network. There are two ways to perform networks randomization: either by shuffling interactions within the networks while enforcing some constraints (shuffle) or by drawing random samples from a probabilistic network (rand).

Draw a network from a probabilistic network

```@docs rand

## Generate probabilistic networks from deterministic networks

These functions generate a probabilistic network from a deterministic network,
where the probability of every interaction is determined by the degree
distribution (or connectance) of the network.

```@docs
null1
null2
null3in
null3out

Shuffle interactions

@docs shuffle! shuffle