Update notebooks, re-add notebook tests

Author: mfeurer

.travis.yml

@@ -19,6 +19,7 @@ env:
   - DISTRIB="conda" PYTHON_VERSION="3.4" SKLEARN_VERSION="0.18.2"
   - DISTRIB="conda" PYTHON_VERSION="3.5" SKLEARN_VERSION="0.18.2"
   - DISTRIB="conda" PYTHON_VERSION="3.6" COVERAGE="true" SKLEARN_VERSION="0.18.2"
+  - DISTRIB="conda" PYTHON_VERSION="3.6" EXAMPLES="true" SKLEARN_VERSION="0.18.2"
 
 install: source ci_scripts/install.sh
 script: bash ci_scripts/test.sh

ci_scripts/install.sh

@@ -26,9 +26,12 @@ popd
 # provided versions
 conda create -n testenv --yes python=$PYTHON_VERSION pip
 source activate testenv
-pip install nose numpy scipy cython scikit-learn==$SKLEARN_VERSION pandas \
-    matplotlib jupyter notebook nbconvert nbformat jupyter_client ipython \
-    ipykernel oslo.concurrency
+pip install nose numpy scipy cython scikit-learn==$SKLEARN_VERSION oslo.concurrency
+
+if [[ "EXAMPLES" == "true" ]]; then
+    pip install matplotlib jupyter notebook nbconvert nbformat jupyter_client ipython \
+        ipykernel pandas seaborn
+fi
 
 if [[ "$COVERAGE" == "true" ]]; then
     pip install codecov