Make a new urllib package .

It consists of code from urllib, urllib2, urlparse, and robotparser.
The old modules have all been removed.  The new package has five
submodules: urllib.parse, urllib.request, urllib.response,
urllib.error, and urllib.robotparser.  The urllib.request.urlopen()
function uses the url opener from urllib2.

Note that the unittests have not been renamed for the
beta, but they will be renamed in the future.

Joint work with Senthil Kumaran.

Lib/wsgiref/util.py

@@ -50,7 +50,7 @@ def guess_scheme(environ):
 def application_uri(environ):
     """Return the application's base URI (no PATH_INFO or QUERY_STRING)"""
     url = environ['wsgi.url_scheme']+'://'
-    from urllib import quote
+    from urllib.parse import quote
 
     if environ.get('HTTP_HOST'):
         url += environ['HTTP_HOST']
@@ -70,7 +70,7 @@ def application_uri(environ):
 def request_uri(environ, include_query=1):
     """Return the full request URI, optionally including the query string"""
     url = application_uri(environ)
-    from urllib import quote
+    from urllib.parse import quote
     path_info = quote(environ.get('PATH_INFO',''))
     if not environ.get('SCRIPT_NAME'):
         url += path_info[1:]