Sometimes components.js is empty and needs to be rebuilt
Never let about:blank or other about: pages go live
Don't load TogetherJS too early (this might never happen), and don't reload TogetherJS if it has already been loaded (as when restarting TogetherJS for Presenting after Live)
Make mirror reload a queue, not a single message.  Suppress warnings about about:blank and init.  Don't send a mirror-fault everytime a tab loads.
Implement new button layout (though without styling).  Implement directed pushes.  Implement push presentation mode.  Some fixes to mirroring.  Reactify the action bar.  Fix mirror-fault.  Put connecting message in mirror blank.