Add Python3

Python3

+FROM python:3.7.0
+ MAINTAINER Tamas Gal <tgal@km3net.de>
+
+ RUN apt-get update -qq && apt-get install -y -qq libhdf5-dev
+ RUN pip install -U pip setuptools wheel
+ RUN pip install numpy
+ RUN pip install scipy pandas sklearn tables h5py matplotlib numba