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/merlin6_sidebar.yml

@@ -0,0 +1,28 @@
+
+# Follow the pattern here for the URLs -- no slash at the beginning, and include the .html. The link here is rendered exactly as is in the Markdown references.
+
+entries:
+- product: Merlin 6
+  levels: one
+  folders:
+  - title: Documentation
+    output: web
+    folderitems:
+    - title: Introduction
+      url: /merlin6/introduction.html
+      output: web
+    - title: Contact
+      url: /merlin6/contact.html
+      output: web
+    - title: Using Merlin6
+      url: /merlin6/use.html
+      output: web
+    - title: User Guide
+      url: /merlin6/user-guide.html
+      output: web
+  - title: Section 2
+    output: web
+    folderitems:
+    - title: broken
+      url: /merlin6/broken.html
+      output: web