Log Message:
Update libnice packages to 0.1.6:

libnice 0.1.6 (2014-04-28)
==========================
API: nice_agent_restart_stream() to do a ICE restart on a single strema
API: nice_component_state_to_string() to get a printable name for a component
  state
API: nice_agent_forget_relays() to forget the relays set for a
  specific component, along with nice_agent_restart_stream(), it allows
  changing the current relay without dropping the connection.
It is now possible to add relays after the initial candidate gathering.
Many bug fixes