Ford Fullkerson/ Edmond karps

Computes the max flow from a source to sink given a graph

%syntax:
% [max_flow] = ford_fulk(source,sink,graph, g_size)
%
% description:
% compute maxflow of a network using ford_fulkerson/Edmond karps
%
% arguments:
% source : source node in graph
% sink : sink node in graph
% graph : graph of nxn sparse matrix
% g_size : size of graph
%
% outputs (uint8):
% max_flow : computed maxflow of the graph between source and sink