[Mindmapping] Adding licence + Update README

mindmapping_to_hdoc/README.md

-Mindmapping to HDOC
-===================
+Converter Mindmapping2HDOC
+==========================
 
 Conversion of Freemind file(s) (.mm) to Hdoc
 
-# How to use the converter
+Licence
+-------
+GPL3.0
 
+Credits
+-------
+Amélie Perdriaud
+Thibault Brocheton
+Bastien Frémondière
+Guillaume Gomez
+
+User documentation
+------------------
 Use a terminal and go to the root of the folder (mindmapping_to_hdoc).
 
 #1 : You want to convert SEVERAL Freemind files in Hdoc
@@ -21,3 +32,17 @@ Use a terminal and go to the root of the folder (mindmapping_to_hdoc).
 
 You will find the result in the folder mindmapping_to_hdoc/result
 
+Unsupported
+-----------
+
+Known bugs
+----------
+
+Todo
+----
+
+Technical notes
+---------------
+
+Capitalisation
+--------------