declare and populate are now separated so we can redeclare the external IP when it changes and get new peers when they are too few

the --ip argument is now optional : it can be discovered automaticaly

Changes in the number of connection per peers

Conflicts:
	tunnelmanager.py

Conflicts:
	tunnelmanager.py

Conflicts:
	TODO

Conflicts:
	vifibnet.py

much faster than calculating distance distance

It is still very slow, I will try to improve performance