add appveyor.yml for basic CI configuration (#12)

Author: mast-eu

appveyor.yml

@@ -0,0 +1,28 @@
+#---------------------------------#
+#      general configuration      #
+#---------------------------------#
+
+# version format
+version: 0.0.0.{build}
+
+# Do not build on tags (GitHub and BitBucket)
+skip_tags: true
+
+# Maximum number of concurrent jobs for the project
+max_jobs: 1
+
+#---------------------------------#
+#    environment configuration    #
+#---------------------------------#
+
+# Build worker image (VM template)
+image:
+- Visual Studio 2017
+- Visual Studio 2019
+
+#---------------------------------#
+#       build configuration       #
+#---------------------------------#
+
+# There is nothing to be build yet
+build: off