Add aliases for some functions/modules renamed in Python 3.

[luk3yx]

This PR adds the following aliases:

• collections.abc → _abcoll
• configparser → ConfigParser (Broken on Windows, this may have to use a meta path importer)
• copyreg → copy_reg
• http.client → httplib
• http.cookiejar → cookielib
• http.cookies → Cookie
• http.server → BaseHTTPServer, CGIHTTPServer, SimpleHTTPServer
• importlib.reload → reload
• itertools.filterfalse → itertools.ifilterfalse
• itertools.zip_longest → itertools.izip_longest
• socketserver → SocketServer
• urllib.error → urllib, urllib2
• urllib.parse → urllib, urlparse
• urllib.request → urllib, urllib2
• urllib.response → urllib
• urllib.robotparser → robotparser

[luk3yx]

Do I need to add more tests?

[stefantalpalaru]

I think we're good. Let me read the changes one more time and I'll merge it.