1)Add history off all sent and received headers/requests 
to addinfourl object. Save redirections history too.

>>> fd = urllib2.urlopen("http://www.python.org/")
>>> print fd.history[0].request_line
GET / HTTP/1.1
>>> print fd.history[0].sended
[('Accept-Encoding', 'identity'), ('Host', 'www.python.org'), ('Connection', 'cl
ose'), ('User-Agent', 'Python-urllib/2.6')]

2)Add support for HEAD (and other) requests:

>>> fd = urllib2.urlopen("http://www.python.org/",
                         request_cmd = "HEAD")
>>> print len(fd.read())
0

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