createGraph: Graph Creation From File
In DavidGilgien/ML.RMCL: Multi-Level Regularized Markov Clustering

This function creates a graph object from a file containing the edges

1 2	createGraph(path, nskip = 0, directed = TRUE, norm = TRUE, inverse.direction = TRUE)

`path`	string: the path to the file containing the edge list.
`nskip`	integer: number of lines to skip before starting to read the edges.
`directed`	boolean: value describing if the edges are directed.
`norm`	boolean: if `TRUE`, translate the vertices names so that they are from 1 to n.
`inverse.direction`	boolean: if `FALSE`, labels the first column `i` and the second `j`, otherwise the inverse. this option is used when creating a graph for the ML-RMCL function, because it understand the edges going from `j` to `i`.