Use a Reader/Writer pattern to simplify the network protocols.

[IntegratedQuantum]

The network Reader/Writer could simplify the protocol code by taking care of ensuring the network byte order, handling the currently explicit pointer incrementing remaining[4..] which is all over the place. And it could also help with #264 by making it easier to handle out of range errors without having to explicitly check them everywhere.

In the future this could allow easily integrating something like varints (ints of variable length).

And as a far-future bonus optimization, we might be able to save an extra copy of the data on receive.