Add a generic factory<Identifier, Product> that simply allows to:
  * Register couple (id, product) ;
  * Retrieve a product with the corresponding id.

Add a generic action<ReturnType, Args...> that is a generic base for all actions.
Add a class that represents a some network (metadata, binary data).
Add support for g++ c++11, add new files.
Change analyze to handle_request.
Code compiling on g++-4.8.1. The server retrieve a wml configuration and send it back.