#299 use urllib2

[Árpád Magosányi]

urllib2 is more functional and gives more features than urllib and httplib which is currently used.
For me kerberos auth was the showstopper.
here is a patch which uses urllib2
Some configuration options are now handled through the http_proxy and https_proxy environment variables.

usage example for kerberos:
import urllib2_kerberos as u2k
import urllib2
opener=urllib2.build_opener()
opener.add_handler(u2k.HTTPKerberosAuthHandler())
server = WSDL.Proxy(wsdlFile, opener = opener)

[Árpád Magosányi]