support Appveyor
diff --git a/appveyor.yml b/appveyor.yml
new file mode 100644
index 0000000..7626808e
--- /dev/null
+++ b/appveyor.yml
@@ -0,0 +1,14 @@
+version: 3.0.4-{build}
+
+os:
+  - Visual Studio 2015
+
+before_build:
+  - call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" amd64
+
+build_script:
+  - mkdir build
+  - cd build
+  - cmake -DCMAKE_BUILD_TYPE=RELEASE -G "NMake Makefiles" ..
+  - nmake
+