initial commit
Add a packetListener that says 'C'est pas faux.' when receiving a Message not comming from this program user
Add a PacketExtention to parse <media></media> tag correctly (to read <source/> tags), but that might be useless.
JingleIQProvider (from Jitsi's API) is also added as one of the IQ Provider, to correctly parse <jingle></jingle> tags.