TST: Add testing on Python 3.5 on Appveyor.

Author: arokem

appveyor.yml

@@ -17,6 +17,10 @@ environment:
       PYTHON_VERSION: "3.4"
       PYTHON_ARCH: "64"
 
+    - PYTHON: "C:\\Python35-conda64"
+      PYTHON_VERSION: "3.5"
+      PYTHON_ARCH: "64"
+
 install:
   # Install miniconda Python
   - "powershell ./tools/install_python.ps1"