demo.6 - Demo content and style changes

- sorted many styles for better groups
- started renaming of variables $basic_front_color becomes
$color_front_basic for example
- new demo page examples
- moved config file examples to deprecated file

source/demo_data.json

@@ -9,8 +9,8 @@
       "text": "Elements"
     },
     {
-      "href": "demo/os.html",
-      "text": "OS"
+      "href": "demo/examples.html",
+      "text": "Examples"
     },
     {
       "href": "demo/tests.html",
@@ -33,6 +33,10 @@
     {
       "href": "demo/error/500.html",
       "text": "500"
+    },
+    {
+      "href": "demo/os.html",
+      "text": "OS"
     }
   ]
 }