Implement NetworkTables.
Fix minor bugs in NetworkTables
Fix
networktables: Merge TransactionDirtier into WriteManager.
Merge ServerIncomingStreamMonitor into NetworkTableServer.
Update NetworkTables docs
Update wpilib docs. Closes #12 for now, though I'm sure there's more to do
networktables: Refactor ReadStream and WriteStream.

Also refactor connection messages.
networktables Array types: fix __setitem__.