requirements: scikit-learn bump
requirements: scikit-learn bump

`scikit-learn==0.16` did not yet have `gamma="auto"` option for SVM (`svm.py`, line 30) and hence the defualt SVM on Iris failed.

qPCR4vir/orange3,cheral/orange3,qPCR4vir/orange3,cheral/orange3,cheral/orange3,qPCR4vir/orange3,cheral/orange3,cheral/orange3,qPCR4vir/orange3,cheral/orange3,qPCR4vir/orange3,qPCR4vir/orange3