Feature Request: Supporting JSON output

[cxhernandez]

Would it be possible to add an option to save an adjacency matrix from MSMBuilder as a JSON file?

I have a python script that does this already and it's like two extra lines using the NetworkX python module:

def mtx2JSON(tprob):
    import networkx as nx
    G = nx.from_scipy_sparse_matrix(tprob)
    return str(nx.readwrite.json_graph.dumps(G))

[rmcgibbo]

Why is json preferable to matrix market?

[cxhernandez]

I'm won't argue that it's preferable to matrix market, just wondering if it could be optional since JSON is the format of choice for things like d3.js