Use https for external links wherever possible in docs

[MRG+1] Add option to disable automatic log handler install

[MRG+1] Changed unhelpful log message from core.downloader.handlers.http11

[MRG+1] Add m4v extension to IGNORED_EXTENSIONS in LinkExtractor.

[MRG+1] Bump Twisted requirement on Python 3 to 17.9.0 to catch many Python 3 fixes.

Link "Debugging in Python" article to its new location

Add note about request.meta['depth'] in DepthMiddleware

Update tutorial.rst startproject files

updated file structure to include middlewares.py

Added middlewares.py to accurately reflect the file structure created by "scrapy startproject tutorial"

Reference: https://web.archive.org/web/20170203104051/http://www.ferg.org/papers/debugging_in_python.html

[MRG+2] Fixes #685 FilesPipeline support for Google Cloud Storage.

[Doc] Update Response.body type

minor fix typo

Fix typos in tests

Print cryptography package version

Update pypy version regexp to get last release

PyPy changed naming conention since 5.8 release, not it's called
pypy2.7-x.x.x

	modified:   scrapy/linkextractors/__init__.py