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Initial implementation of loopless zmq transport
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Fix block identation
Merge branch 'master' into loopless

Conflicts:
	tests/zmq_events_test.py
Test pause reading
Reduce iteration count
Set eventloop policy back to default
Don't do read from closed zmq socket
Improve runtests.py
Fix exit fror unittest runner
Fix pyflakes errors
Fix eventual test error
Refactor transport.write
Unregister reader on delayed closing
Fix loopless tr._force_close()
Fix test runner
Fix test runner
Process connection lost
Fix pause reading for loopless transport