/// <summary>
/// Creates a dependancy graph from another dependancy graph.
/// </summary>
/// <param name="dg"></param>
public DependencyGraph(DependencyGraph dg)
{
cellDict = new Dictionary <string, Cell>();
foreach (String s in dg.GetCells().Keys.ToList <String>())
{
foreach (String t in dg.GetDependents(s))
{
AddDependency(s, t);
}
}
}