Replacing default content with HPCE stuff

- Add README.md
- Customize _config.yml
- /merlin6/ pages (moved from merlin6-user-guide)
- remove demo products
- remove update.sh

_data/topnav.yml

@@ -3,8 +3,8 @@
 topnav:
 - title: Topnav
   items:
-    - title: GitHub
-      external_url: https://github.com/tomjoht/documentation-theme-jekyll
+    # - title: GitHub
+    #   external_url: https://github.com/tomjoht/documentation-theme-jekyll
     - title: News
       url: /news
 
@@ -12,21 +12,13 @@ topnav:
 topnav_dropdowns:
 - title: Topnav dropdowns
   folders:
-    - title: Jekyll Help
+    - title: Merlin 6
       folderitems:
-        - title: Jekyll Talk
-          external_url: https://talk.jekyllrb.com
-        - title: Jekyll documentation
-          external_url: http://jekyllrb.com/docs/home/
-        - title: Jekyll on Stack Overflow
-          external_url: http://stackoverflow.com/questions/tagged/jekyll
-        - title: Jekyll on my blog
-          external_url: http://idratherbewriting.com/category-jekyll/
-    - title: Products
-      folderitems:
-        - title: Jekyll Documentation Theme
-          url: /mydoc_introduction.html
-        - title: Product 1
-          url: /p1_landing_page.html
-        - title: Product 2
-          url: /p2_landing_page.html
+        - title: Introduction
+          url: /merlin6/introduction.html
+        - title: Contact
+          url: /merlin6/contact.html
+        - title: Using Merlin6
+          url: /merlin6/use.html
+        - title: User Guide
+          url: /merlin6/user-guide.html