Bugfix for leaking Proxy-Authorization header to remote host when using
tunneling
Add test case for tunneling proxy
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
Use w3lib.html.replace_entities() (remove_entities() is deprecated)
Update w3lib requirement to 1.8.0
Merge pull request #817 from nramirezuy/fix-startproject-project-name

[MRG] Fix startproject project name
Merge pull request #832 from ivannotes/master

Bugfix for leaking Proxy-Authorization header to targeted host
update other places where w3lib version is mentioned
Merge branch 'w3lib-warnings'
Merge branch 'master' of https://github.com/scrapy/scrapy
optparse to argparse