Install scikit-image before setup.py install

.travis.yml

@@ -71,9 +71,11 @@ install:
       if [ "$USE_CONDA" = "true" ]; then
         conda create --name=labelme python=$TRAVIS_PYTHON_VERSION -q -y;
         conda install pyqt=4 -q -y;
+        conda install scikit-image -q -y;
       else
         cp -r $(dirname $($SYSTEM_PYTHON -c 'import PyQt4; print(PyQt4.__file__)')) ~/virtualenv/python2.7/lib/python2.7/site-packages/;
         cp $($SYSTEM_PYTHON -c 'import sip; print(sip.__file__)') ~/virtualenv/python2.7/lib/python2.7/site-packages/;
+        pip install -U numpy scipy scikit-image;
       fi;
     elif [ "$TRAVIS_OS_NAME" = "osx" ]; then
       pyenv global $PYTHON_VERSION;