start updating TelepathyQt to use newer farstream
Update FindGStreamer0.10 -> FindGStreamer1.0

Reviewed-by: David Edmundson
Added BaseChannelSASLAuthenticationInterface.
BaseConnection: Implemented missed addChannel() method.
BaseChannelCaptchaAuthenticationInterface: Fixed property exposing.
BaseConnectionAddressingInterface: Fixed comments.
base-connection.cpp: Fixed comments.
BaseChannel: Added setUniqueName() method.
Added BaseConnectionContactInfoInterface.
Added BaseChannelSecurableInterface.
Added BaseConnectionAvatarsInterface.