Create links python and pip to python3 and pip3.

docker/2_buildpy/includepy.docker

@@ -1,9 +1,14 @@
 FROM pillar_base
-MAINTAINER Sybren A. Stüvel <sybren@blender.studio>
+LABEL maintainer Sybren A. Stüvel <sybren@blender.studio>
 
 ADD python /opt/python
+
 RUN echo /opt/python/lib > /etc/ld.so.conf.d/python.conf
 RUN ldconfig
 
 RUN echo Python is installed in /opt/python/ > README.python
 ENV PATH=/opt/python/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+
+RUN cd /opt/python/bin && \
+    ln -s python3 python && \
+    ln -s pip3 pip