module_degree_zscore directed version wrong?

[silverbullet1472]

Here is the MATLAB version comments:

 flag,   0, undirected graph (default)
%                       **1, directed graph: out-degree**
%                       **2, directed graph: in-degree**
%                       3, directed graph: out-degree and in-degree

This is bctpy version:

 # flag : int
    #     Graph type. 0: undirected graph (default)
    #                 **1: directed graph in degree**
    #                 **2: directed graph out degree**
    #                 3: directed graph in and out degree

Notice that they use different flag. And for py version, it transposes connection matrix for OUT DEGREE. I look up the code and found we use NP.SUM AXIS=1 which means it applies row-wise summation, so it's made for OUT DEGREE, so maybe do not need transposition?

[silverbullet1472]

I test 2 version using same dataset. I think it is wrong, the comment for py version should be changed.