fix examples in regard to wsgi2->wsgi name change

examples/webchat/run.py

 #!/usr/bin/python
 from gevent import monkey; monkey.patch_all()
-from gevent import wsgi2
+from gevent.wsgi import WSGIServer
 import os
 import traceback
 from django.core.handlers.wsgi import WSGIHandler
@@ -16,5 +16,5 @@ got_request_exception.connect(exception_printer)
 
 call_command('syncdb')
 print 'Serving on 8088...'
-wsgi2.WSGIServer(('', 8088), WSGIHandler()).serve_forever()
+WSGIServer(('', 8088), WSGIHandler()).serve_forever()
 

examples/webproxy.py

 #!/usr/bin/python
 from gevent import monkey; monkey.patch_all()
-from gevent import wsgi2
+from gevent import wsgi
 import sys
 import re
 import traceback
@@ -109,5 +109,5 @@ if __name__ == '__main__':
     #import doctest
     #doctest.testmod()
     print 'Serving on 8088...'
-    wsgi2.WSGIServer(('', 8088), application).serve_forever()
+    wsgi.WSGIServer(('', 8088), application).serve_forever()
 

examples/wsgiserver.py

 #!/usr/bin/python
 """WSGI server example"""
 
-from gevent import wsgi2
+from gevent import wsgi
 
 def hello_world(env, start_response):
     if env['PATH_INFO'] == '/':
@@ -12,5 +12,5 @@ def hello_world(env, start_response):
         return ['Not Found\r\n']
 
 print 'Serving on 8088...'
-wsgi2.WSGIServer(('', 8088), hello_world).serve_forever()
+wsgi.WSGIServer(('', 8088), hello_world).serve_forever()