appveyor.yml: Add links on CMake generators and installed VS versions

diff --git a/appveyor.yml b/appveyor.yml
index 14fc8e1c927f81c66c6358d9ace45eef840580f9..34f7395e100869bfa6e4be00d75cfbc0d04acdbe 100644 (file)
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -43,6 +43,11 @@ clone_folder: c:\projects\libexpat
 
 configuration: Debug
 
+# AppVeyor pre-installed software:
+# https://www.appveyor.com/docs/build-environment/#pre-installed-software
+#
+# CMake Visual Studio generators:
+# https://cmake.org/cmake/help/latest/manual/cmake-generators.7.html#visual-studio-generators
 environment:
   matrix:
     # Visual Studio 2012 Win32