Add support for live data subscription via Device::subscribeLiveData() and
Device::unsubscribeLiveData(). The live data API can be used to subscribe to
individual "signals", a full list of which can be found in LiveDataValueType.
The following fixups were added during the squash/merge:
Fix formatting in EthPhyMessage and EthPhyRegPacket
Device: Use std::make_shared when creating the EthPHYControl filter
Network: Create NetID String for EthPHYControl
EthPhyRegPacket: Constants in PascalCase
We've also decided to leave it out of the message structures since, for most uses going forward, it will not be needed.
Anyone who wants the timestamp resolution can always make the inexpensive device call to get it.
Kyle Johannes
Yasser Yassine
Jonathan Schwartz
Emily Brooks
Paul Hollinsky
Kyle Schwarz
David Rebbe