Add netstream and test

CMakeLists.txt

include/ftl/protocol.hpp

include/ftl/protocol/self.hpp

include/ftl/protocol/streams.hpp

include/ftl/threads.hpp

src/peer.cpp

src/protocol.cpp

src/self.cpp

src/streams/broadcaster.cpp

src/streams/muxer.cpp

src/streams/netstream.cpp

src/streams/netstream.hpp

src/streams/packetMsgpack.hpp

src/streams/streams.cpp

src/universe.cpp

src/universe.hpp

test/CMakeLists.txt

test/net_integration.cpp

test/stream_integration.cpp