Default matplotlib to inline backend

Fixes #235

(c) Copyright IBM Corp. 2016

scipy-notebook/Dockerfile

@@ -63,6 +63,10 @@ RUN conda create --quiet --yes -p $CONDA_DIR/envs/python2 python=2.7 \
 RUN ln -s $CONDA_DIR/envs/python2/bin/pip $CONDA_DIR/bin/pip2 && \
     ln -s $CONDA_DIR/bin/pip $CONDA_DIR/bin/pip3
 
+# Configure ipython kernel to use matplotlib inline backend by default
+RUN mkdir -p $HOME/.ipython/profile_default && \
+    echo "c.InteractiveShellApp.matplotlib = 'inline'" > $HOME/.ipython/profile_default/ipython_kernel_config.py
+
 USER root
 
 # Install Python 2 kernel spec globally to avoid permission problems when NB_UID