Generate asynchronous setters for DBus properties
Generate asynchronous setters for DBus properties

The new setters are named setPropertyFoo, where Foo is the property
name, and return a Tp::PendingOperation. They will completely replace
synchronous setters after the API break.

freedesktop-unofficial-mirror/telepathy__telepathy-qt4,TelepathyQt/telepathy-qt,TelepathyIM/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,freedesktop-unofficial-mirror/telepathy__telepathy-qt,tiagosh/telepathy-qt,special/telepathy-qt-upstream,TelepathyIM/telepathy-qt,tiagosh/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,freedesktop-unofficial-mirror/telepathy__telepathy-qt,anantkamath/telepathy-qt,special/telepathy-qt-upstream,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,tiagosh/telepathy-qt,TelepathyQt/telepathy-qt,detrout/telepathy-qt,TelepathyIM/telepathy-qt,special/telepathy-qt-upstream,TelepathyQt/telepathy-qt,detrout/telepathy-qt,tiagosh/telepathy-qt,anantkamath/telepathy-qt,anantkamath/telepathy-qt,TelepathyQt/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,TelepathyIM/telepathy-qt,detrout/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,TelepathyIM/telepathy-qt