[Aggregator] No use in boost.foreach now.
[Aggregator] IProxyObject::GetChannelsModel().
[Aggregator WA] Added basic Q2WProxyModel.
[Aggregator] Added UnreadCount role.
[Aggregator WA] Smarter conversion.
[Aggregator WA] Don't fail in filter on failed boost::any_cast.
[Aggregator WA] Migrate to Q2WProxyModel for channels.