Use home folder for default presentation

Add an example presentation for a section

exampleSite/content/home/body.md

@@ -0,0 +1,43 @@
++++
+weight = 20
++++
+
+# reveal-hugo
+
+Presentation content lives in `content/reveal`.
+
+Or manually set the type.
+
+```toml
++++
+type = "reveal"
++++
+```
+
+---
+
+# reveal-hugo
+
+Presentation sections are ordered by `weight`.
+
+```toml
++++
+weight = 20
++++
+```
+
+---
+
+# reveal-hugo
+
+Protip: use `fragment` shortcode to make content appear in sequence.
+
+```
+{{%/* fragment */%}} One {{%/* /fragment */%}}
+{{%/* fragment */%}} Two {{%/* /fragment */%}}
+{{%/* fragment */%}} Three {{%/* /fragment */%}}
+```
+
+{{% fragment %}} One {{% /fragment %}}
+{{% fragment %}} Two {{% /fragment %}}
+{{% fragment %}} Three {{% /fragment %}}