Install pillow on all travis builds

dstansby · dstansby · commit f0fb2234a2b8 · 2017-05-11T16:50:31.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -115,7 +115,7 @@ install:
     pip install --upgrade setuptools
   - |
     # Install dependencies from pypi
-    pip install $PRE python-dateutil $NUMPY pyparsing!=2.1.6 $PANDAS cycler codecov coverage $MOCK $NOSE sphinx
+    pip install $PRE python-dateutil $NUMPY pyparsing!=2.1.6 $PANDAS cycler codecov coverage $MOCK $NOSE sphinx pillow
     if [[ $BUILD_DOCS == true ]]; then
       pip install $PRE -r doc-requirements.txt
     fi
