Merge in non-conflicting changes from ba67e397f063 including workaround for: https://bugs.python.org/issue27777 1) cgi/client.py: override cgi.FieldStorage's make_file so that file is always created in binary/byte mode. This means that json (and xml) are bytes not strings. 2) rest.py: try harder to find dicttoxml in roundup directory or on sys.path. This just worked under python 2 but python 3 only searches sys.path by default and does not search relative like python 2. 3) test/rest_common.py: workaround for issue27777 Also removed an unneeded case insensitive dict implementation.

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