Concoct_refine python version issues

[KimSummers]

Strong crashes in concoct_refine, due to issues with python methods changing. Can be resolved by running:
sed -i 's/original_data.values()/original_data.values/g' $(which concoct_refine)
sed -i 's/.as_matrix()/.values/g' $(which concoct_refine)

[Sebastien-Raguideau]

I did a fork of concoct, change this stuff and added an argument to vbgmm.fit. Chris, I did a pull request on that, do you have any possibility to examine pull request for concoct?