docs: improve getting started post (#77)

The getting started post contains a few inconsistencies:
- The atom feed does not work due to a typo
- The menu icons do not show up due to wrong icon names
- The full configuration does not mention `pluralizeListTitles` and
  `paginate`

exampleSite/content/posts/getting-started.md

@@ -106,7 +106,7 @@ To prepare your new site environment just a few steps are required:
        noUgly = true
        permalinkable = false
 
-   [outputFormats.outputs]
+   [outputs]
      home = ["HTML", "ATOM"]
      page = ["HTML"]
      section = ["HTML"]
@@ -168,6 +168,9 @@ baseURL = "http://localhost"
 title = "Geekblog"
 theme = "hugo-geekblog"
 
+paginate = 5
+pluralizeListTitles = false
+
 # Required to get well formatted code blocks
 pygmentsUseClasses = true
 pygmentsCodeFences = true
@@ -278,6 +281,9 @@ enableGitInfo = true
 
 theme: hugo-geekblog
 
+paginate: 5
+pluralizeListTitles: false
+
 # Required to get well formatted code blocks
 pygmentsUseClasses: true
 pygmentsCodeFences: true
@@ -462,13 +468,13 @@ If you want to customize the menus (header and footer), this can be achieved by
 ---
 header:
   - name: Github Profile
-    icon: github
+    icon: gblog_github
     ref: "https://github.com/xoxys"
     external: true
 
 footer:
   - name: Contact
-    icon: email
+    icon: gblog_email
     ref: "/contact"
 ```