criticalSets: Find all critical sets in a network
In OwenSims/networkR: A package for analysing social and economic networks

This function calculates all critical sets in the network.

1	criticalSets(edgeList, nodeList, s, adjMatrix, setPS, setPower, approximate)

`edgeList`	A dataframe of network data within which sources are in the first column and targets are in the second column.
`nodeList`	A dataframe within which all nodes and their respective names are listed.
`s`	The maximum size of block that is considered within the block formation game.
`adjMatrix`	The network represented as an adjacency matrix.
`setPS`	The set of predeccessors and successors for each combination of nodes considered.
`setPower`	All sets within a network along with their respective brokerage scores.
`approximate`	Should the Strong Nash Equilibrium be approximated? TRUE or FALSE.