tornado experimentation WIP
More tornado WIP
Tornado WIP
Use stream.set_nodelay method to set TCP socket options
Set maximum message and stream buffer sizes
Hook in on-close callback stub
Handle disconnection and shutdown properly
Tornado WIP -- integrating tornado server with DeviceServer, and implenting a request handler thread
Turn line-read loop into coroutine, remove some cruft
Apparently working server shutdown and restart
Make all device.on_* methods return futures
Minor fixes to pass test_server.py tests, excise ExceptHookThread
Fix client test post removal of except_hook and daemon options
Merge pull request #9 from ska-sa/tornado-play

Replace home-grown network IO stack with tornado for katcp server