Added referer to "Spider error processing" log message + fixed some pep8 issues
Bugfix for leaking Proxy-Authorization header to remote host when using
tunneling
Add test case for tunneling proxy
normalize header values to bytes
fix ftp test cases
Merge pull request #828 from dangra/string-headers

normalize header values to bytes (and PY3)
PY3 enable more tests
PY3 fix test_utils_sitemap.

Sitemap class is only initialized with bytes by Scrapy;
broken tests was only a testing issue.
PY3 port scrapy.utils.spider
PY3 enable more tests
PY3 port scrapy.utils.misc.arg_to_iter; fix scrapy.utils.misc.md5sum doctest
TST enable doctests for Python 3
PY3 port scrapy.contrib.feedexport
add project name validation
exitcode and prints fixed, some code reworking
TST modernize some of the asserts
PY3 port scrapy.link
Merge pull request #835 from scrapy/modernize-asserts

[MRG] modernize some of the asserts
PY3 top-level shortcuts work
Modernize setup.py