Please add Edge's weight support

[rahatipour]

I want to use your implementation of paper titled "Newman, M. E. J. (2006). Modularity and community structure in networks. Proceedings of the National Academy of Sciences of the United States of America, 103(23), 8577–82" but my graph has weight in it's edges.but this implementation ignore graph weight

[thelahunginjeet]

I've done this in my forked version of Zhiya's repo. I have created a pull request so hopefully it will be approved.