Release notes

0.7

• terminado.TermSocket.open() now calls the open() method on the parent class using super(). This allows a mixin class; for instance, to periodically send ping messages to keep a connection open.
• When a websocket client disconnects from a terminal managed by UniqueTermManager, the SIGHUP signal is sent to the process group, not just the main process.
• Fixed terminado.NamedTermManager.kill() to use the signal number passed to it.
• Switched to Flit packaging.
• README and requirements for demos.