Added documentation for the picklefile module

lodel/editorial_model/translator/picklefile.py

 #-*- coding: utf-8 -*-
 
+## @brief This module handles the file storage of an editorial model
+
 import pickle
 from pickle import Pickler
 
-##@brief Save a model in a file
+##@brief Saves a model in a file
 # @param model EditorialModel : the model to save
-# @param filename str|None : if None return the model as pickle bytes
+# @param filename str|None : if None return the model as pickle bytes (by default : None)
 # @return None if filename is a string, else returns bytes representation of model
 def save(model, filename = None):
     with open(filename, 'w+b') as ffd:
         pickle.dump(model, ffd)
     return filename
 
-##@brief Load a model from a file
+##@brief Loads a model from a file
 # @param filename str : the filename to use to load the model
+# @return EditorialModel
 def load(filename):
     with open(filename, 'rb') as ffd:
         edmod = pickle.load(ffd)