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/sidebars/home_sidebar.yml

@@ -1,22 +1,18 @@
 # This is your sidebar TOC. The sidebar code loops through sections here and provides the appropriate formatting.
 
 entries:
-- title: Sidebar
+- product: HPCE
   levels: one
   folders:
-
-  - title: Products
+  - title: Services
     output: web
     folderitems:
+    - title: Overview
+      url: /index.html
+      output: web
     - title: News
       url: /news.html
       output: web
-    - title: Theme instructions
-      url: /mydoc_introduction.html
-      output: web
-    - title: Product 1
-      url: /p1_landing_page.html
-      output: web
-    - title: Product 2
-      url: /p2_landing_page.html
-      output: web
+    - title: Merlin 6
+      url: /merlin6/introduction.html
+      output: web