Add ipc.stream with basic stream IPC classes
Add ipc.stream with basic stream IPC classes

Add ipc.stream module with main ipc.stream.StreamIPC class to define a
standard text-based IPC mechanism using streams.  The signals follow
the standard `signal=value\n' format, as when using stdin and stdout.

Also define ipc.stream.StdioIPC as a direct StreamIPC implementation
using sys.stdin and sys.stdout.

Finally, define ipc.stream.SocketIPC class to exchange the same data
but using a TCP client connection to a server.

Signed-off-by: Guillaume Tucker <e7e20b7c30f19d4ca6b81319ef81bf200369d137@collabora.com>

GENIVI/vehicle_signal_manager