CI: Add initial AppVeyor configuration
diff --git a/appveyor.yml b/appveyor.yml
new file mode 100644
index 0000000..ec96bb3
--- /dev/null
+++ b/appveyor.yml
@@ -0,0 +1,8 @@
+image: Visual Studio 2019
+configuration: Release
+    
+build:
+  project: basisu.sln
+  
+artifacts:
+  - path: bin\Release\*.*