Heavy refactor to self-contain non commited code

* Skin isolated in extension skin/ folder
* Renamed CompaTables extension to Compatables
* Making the skin part of the extension
* Compatibility tables guess by itself path to CSS

Change-Id: I44f4873f8d4a4fa54a8c5ca48b4644a0def513f2
Importing external extensions, preparing deployment
Preparing deployment
Preparing deployment 2
Preparing deployment 3, changing documentation due to broken dependencies
Adding some more notes
Adding some more notes, updated composer
Moving CSS images links to local instead of relying elsewhere
Preparing to move fonts, fixing breadcrumb
Moving static files out of extension to www project
Moving Comments extension comment to the bottom, NS_MAIN would not exist