pyon: add doc
pc_rpc: document
test/pc_rpc: support slow server startups
pc_rpc: remove WaitQuit (use e.g. Ctrl-C on the controller side instead)
doc/manual: tutorial -> getting started
doc/manual: split core/controller drivers
pdq2: fix commandline arguments
pc_rpc: factor out asyncio server code
doc/manual: driver writing tutorial
doc: some precisions about controllers
pc_rpc: server identification support