nodeSetBrokerage: Brokerage of a node given its presence in a node set
In OwenSims/networkR: A package for analysing social and economic networks

This function calculates the brokerage of each node given its existence in critical sets.

1 2	nodeSetBrokerage(edgeList, nodeList, s, perCapita, 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.
`perCapita`	The brokerage power of the node set divided by the number of nodes within the set.
`adjMatrix`	The network represented as an adjacency matrix.
`setPS`	The set of predeccessors and successors for each combination of nodes considered.
`approximate`	Should the Strong Nash Equilibrium be approximated? TRUE or FALSE.