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