Rename and improve section example

exampleSite/content/example/_index.md

@@ -1,10 +0,0 @@
-+++
-title = "Example of a section presentation"
-outputs = ["Reveal"]
-[reveal_hugo]
-theme = "moon"
-+++
-
-# Section Presentation
-
-Only content from this section will go into this presentation.

exampleSite/content/section-example/_index.md

@@ -0,0 +1,18 @@
++++
+title = "Example of a section presentation"
+outputs = ["Reveal"]
+[reveal_hugo]
+theme = "moon"
++++
+
+# Section Presentation
+
+This is an example of a section presentation.
+
+---
+
+Section presentations are completely separate from the root presentation and each other.
+
+---
+
+Additional content files can be placed in the section and will be added to the presentation in the order of their weight.

exampleSite/content/section-example/presentation.md

@@ -5,3 +5,4 @@ weight = 10
 # Including...
 
 Content from files like this one.
+