Added some commentson header function

README.txt

 Dependencies :
 	with pip : see requirements.txt
-	debian stable : python3 python3-lxml python3-jinja2 python3-werkzeug python3-pymongo doxygen graphviz uwsgi-plugin-python3 mongodb
+	debian stable : python3 python3-lxml python3-jinja2 python3-werkzeug python3-pymongo uwsgi-plugin-python3 mongodbd
 
 Doxygen documentation generation :
+	dependencies: doxypy doxygen graphviz
 	doxygen
 
 Dynamic code generation :

lodel/leapi/lefactory.py

 #-*- coding: utf-8 -*-
 
 import functools
-from lodel.editorial_model.components import *
+#from lodel.editorial_model.components import *
 from lodel.leapi.leobject import LeObject
 from lodel.leapi.datahandlers.base_classes import DataHandler
 
 ##@brief Generate dyncode from an EmClass
 # @param model EditorialModel : 
 # @param emclass EmClass : EmClass instance
+# @todo delete imports. It is never use, consequently changed return parameters.
 # @return a tuple with emclass python code, a set containing modules name to import, and a list of python instruction to bootstrap dynamic code, in this order
 def generate_classes(model):
     res = ""

lodel/utils/mlstring.py

     ]
 
     ##@brief Create a new MlString instance
-    # @param arg str | dict : Can be a json string, a string or a dict
+    # @param arg str | dict : Can be a json string, a string or a dict. It could be also a MlString object
     def __init__(self, arg):
         self.values = dict()
         if isinstance(arg, str):