Squashed commit of the following:

commit 5685f76fbd426c781692d8877676c34ed53a7299
Author: Kylart <Kylart.dev@gmail.com>
Date:   Sat Jul 13 15:17:46 2019 +0200

    Removed unnecessary comment
    Added documentation links

commit d0e58142b7af1d0588726288308b39adf33f4316
Author: Kylart <Kylart.dev@gmail.com>
Date:   Sat Jul 13 15:11:52 2019 +0200

    Revert to working version of appveyor?

appveyor.yml

@@ -1,15 +1,11 @@
 image: Visual Studio 2017
 
-os: unstable
-
 cache:
-  - node_modules -> package.json
+  - node_modules
+  - '%USERPROFILE%\.electron'
 
 skip_tags: true
 
-environment:
-  nodejs_version: "11"
-
 platform:
   - x64
 
@@ -17,7 +13,7 @@ init:
   - git config --global core.autocrlf input
 
 install:
-  - ps: Install-Product node $env:nodejs_version
+  - ps: Install-Product node 12 x64
   - npm install
 
 test_script:

test/index.spec.js

@@ -7,6 +7,10 @@
  *
  * We'll make each app test so that it leaves the app in a neutral state,
  * meaning that any action should be possible once any test is done.
+ *
+ * Documentation is at:
+ *   - Spectron: https://github.com/electron-userland/spectron#application-api
+ *   - Webdriver.io: https://webdriver.io/docs/api/browser/waitUntil.html
  */
 
 describe('KawAnime main test routine', function () {