Merge pull request #3430 from takluyver/appveyor-conda-fix

Trying to fix Appveyor build errors

appveyor.yml

@@ -4,8 +4,8 @@ matrix:
 
 environment:
   matrix:
-    - CONDA_PY: 35
-      CONDA_INSTALL_LOCN: "C:\\Miniconda35-x64"
+    - CONDA_PY: 36
+      CONDA_INSTALL_LOCN: "C:\\Miniconda36-x64"
     - CONDA_PY: 27
       CONDA_INSTALL_LOCN: "C:\\Miniconda-x64"
 
@@ -18,7 +18,7 @@ install:
   - cmd: call %CONDA_INSTALL_LOCN%\Scripts\activate.bat
   - cmd: conda config --set show_channel_urls true
   - cmd: conda config --add channels conda-forge
-  - cmd: conda update --yes --quiet conda
+  #- cmd: conda update --yes --quiet conda
   - cmd: conda install -y pyzmq tornado jupyter_client nbformat nbconvert ipykernel pip nodejs nose
   - cmd: pip install .[test]