Implement startup-to-live-TV

Implement startup-to-live-TV
Convert the ChannelList vector to be managed by shared_ptr -
this allows either VChannelList or VVideoLiveTV to own it, and
it still be deleted appropriately.
Convert ChannelList vector to a subclass so its destructor
can automatically delete the Channel objects.
However, the net says "Thou shalt not subclass std::vector"...