- test__subprocess.py: ignore test_nonblock_remove on win32
- test__example_portforwarder.py
- test__examples.py: ignore geventsendfile.py and psycopg2 on Windows
- testrunner.py: set timeout to 3 min
  some systems have really slow DNS and test__socket_dns.py fails
- test___example_servers.py: use 127.0.0.1 instead of localhost
  helps on Windows server where DNS calls are slow for some reason