FIX: make sure zen.control gets copied to installation dir

Hi,

thanks a lot for sharing this code. The library looks very promising.

Please find attached a minor fix for the installation.

A small unrelated question, is there a function to generate a graph object from a numpy array directly that avoids looping over all nodes in python?

ATM I'm (mis)using the networkx function:

    A = np.ones((10,10)
    G = zen.nx.from_networkx(nx.DiGraph(A)) 

Best,
 Matthias