add ref and order to main pages

Author: lorepirri

about.md

@@ -3,6 +3,8 @@ layout: page
 title: About
 tagline: A few more words about this theme
 permalink: /about.html
+ref: about
+order: 0
 ---
 
 This is the _Cayman Blog_ Jekyll theme. You can find out more info about customizing this theme, as well as basic usage documentation, and source code at: [cayman-blog](https://github.com/lorepirri/cayman-blog)

contact.md

@@ -2,6 +2,8 @@
 layout: page
 title: Contact
 tagline: Create a contact form and you are good to go
+ref: contact
+order: 1
 ---
 
 Jekyll is a great tool to create static sites but with static site, there's no backend to send your data to: that is why you need a third part service.