Update appveyor.yml

Hosch250 · Hosch250 · commit 24aaaa2448e7 · 2017-03-09T17:38:26.000-06:00
diff --git a/appveyor.yml b/appveyor.yml
@@ -15,3 +15,7 @@ notifications:
   on_build_success: true
   on_build_failure: true
   on_build_status_changed: true
+
+os: Visual Studio 2015
+install:
+- set PATH=C:\Program Files (x86)\MSBuild\14.0\Bin;%PATH%
