Merge pull request #2084 from dnephin/windows

WIP: Add appveyor config for testing on windows and building windows binary

appveyor.yml

@@ -0,0 +1,15 @@
+
+install:
+  - "SET PATH=C:\\Python27-x64;C:\\Python27-x64\\Scripts;%PATH%"
+  - "python --version"
+  - "pip install tox==2.1.1"
+
+
+# Build the binary after tests
+build: false
+
+test_script:
+  - "tox -e py27,py34 -- tests/unit"
+
+after_test:
+  - ps: ".\\script\\build-windows.ps1"