#18 presence service - beta 3.2.1

[Rafael Melendreras Ruiz]

When a user abandons the application, it takes a lot of
time for the other users to find out that he is not
connected (and consequently erase him from his peer
list – approximately 5 minutes).

The remote users could feel insatisfied if they try to
stablish any communication with a peer that apparently
is active and really is not.