Bug fixes + some improvements

# localization.py …
+ list of possible position when lack of information in pe_clust

# Agent.py/Person3.py
+ forbiden room by agent can be setup
+ wait time by agent can be setup

# Network.py
+ new save options: 'loc', 'dual' (temporary options: will be replace by a global save )

+ BUG FIX : node not created when node ID was > 9
process)
+ Improve vizualization

# Steering Behaviour
+ New wall virtual force model ( \lambda / R**2)
+ correct radius

# simulnet.py
+ compliant with new agent.py/Person3.py

# agent.ini
+ compliant with new agent.py.Person3.py