BaseConnection: Added a draft documentation for ensureChannel() method.
BaseConnection: Added a draft documentation for ensureChannel() method.

TelepathyQt/telepathy-qt,TelepathyQt/telepathy-qt,TelepathyIM/telepathy-qt,TelepathyIM/telepathy-qt,tiagosh/telepathy-qt,TelepathyIM/telepathy-qt,TelepathyQt/telepathy-qt,tiagosh/telepathy-qt,tiagosh/telepathy-qt,TelepathyQt/telepathy-qt,tiagosh/telepathy-qt,TelepathyIM/telepathy-qt,TelepathyIM/telepathy-qt