Add windows (cygwin) install instructions.

Remove send_message since nothing was calling it. Remove Snapshot because only send_message was using it

Construct the EventContext in the state handler rather than constructing one and then immediately calling state_handler.annotate_context_with_state

Remove annotate_event_with_state as nothing was using it. Update state tests to call annotate_context_with_state

Handle the case when there are colons in server_name. Handle http
exceptions more gracefully.

Event refactor

headers.

_ not -

Conflicts:
	tests/handlers/test_room.py