README update with dependencies

README.txt

@@ -1,6 +1,10 @@
 Local configuration :
 	First of all copy the settings.ini to settings_local.ini and replace values by correct path
 
+Dependencies :
+	with pip : see requierments.txt
+	debian stable : python3 python3-lxml python3-jinja2 python3-werkzeug python3-pymongo doxygen graphviz
+
 Doxygen documentation generation :
 	doxygen