Made some basic refactoring of the cleaning function for the references.
Refactored the reference creation.
Extractors moved on the serverside.
Improved the cloning process. Cloning is now parallel and the errors are managed.
Added default tree structure for the tags (serverside).
Added missing readme.
Added default tree structure for the tags (clientside).
Added empty structure to the default tag controller.
Removed unused bootstrap attribute.
Added tags controller serverside.
Added basic angular tags service.
Added references paginator with friendly page selection system.
Fixed function names for pagination buttons to make them ready to reuse in a directive.
Temporarily set a virtual total number of items in references browsing listing.
Applied pagination system to network panel.
Merge origin/master