Add ToC to long pages

* A compact, fixed box in the right screen
* Only for big screens, > 1200 px wide

docs/content/extras/crossreferences.md

@@ -6,6 +6,7 @@ menu:
 next: /extras/livereload
 prev: /extras/comments
 title: Cross-References
+toc: true
 weight: 40
 ---
 

docs/content/extras/dynamiccontent.md

@@ -9,6 +9,7 @@ next: /extras/highlighting
 prev: /extras/datafiles
 title: Dynamic Content
 weight: 91
+toc: true
 ---
 
 Dynamic content with a static site generator? Yes, it is possible!

docs/content/extras/highlighting.md

@@ -9,6 +9,7 @@ next: /extras/toc
 prev: /extras/shortcodes
 title: Syntax Highlighting
 weight: 90
+toc: true
 ---
 
 Hugo provides the ability for you to highlight source code in two different

docs/content/extras/menus.md

@@ -1,5 +1,7 @@
 ---
 date: 2014-05-14T02:36:37Z
+toc: true
+tocstyle: compact
 menu:
   main:
     parent: extras

docs/content/extras/shortcodes.md

@@ -9,6 +9,8 @@ next: /extras/pagination
 prev: /extras/permalinks
 title: Shortcodes
 weight: 80
+toc: true
+tocstyle: compact
 ---
 
 Hugo uses Markdown for its simple content format. However, there are a lot