two dockerfiles as prelude to testing

Dockerfile.py34

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+FROM ubuntu
+MAINTAINER Jim Rybarski <jim@rybarski.com>
+
+RUN mkdir -p /var/nds2
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    python3-numpy
+
+COPY . /opt/nd2reader
+WORKDIR /opt/nd2reader
+RUN python3 setup.py install
+WORKDIR /var/nd2s
+
+CMD /usr/bin/python3.4