performance improvement to cookie handling when a single spider is crawling a large number of domains
Explicitly check if an object is a class is pydispatch.

* This is to fix a disagreement in between CPython and PyPy.
* https://gist.github.com/4220533
PEP8 on pydispatch/robustapply.py
doc: Response.replace() cannot take meta argument

>>> response.replace(meta={'foo':1})
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/srv/scrapy/scrapy-fork/scrapy/scrapy/http/response/text.py", line 45, in replace
    return Response.replace(self, *args, **kwargs)
  File "/srv/scrapy/scrapy-fork/scrapy/scrapy/http/response/__init__.py", line 77, in replace
    return cls(*args, **kwargs)
  File "/srv/scrapy/scrapy-fork/scrapy/scrapy/http/response/text.py", line 22, in __init__
    super(TextResponse, self).__init__(*args, **kwargs)
TypeError: __init__() got an unexpected keyword argument 'meta'
doc: remove trailing spaces
pipelines argument added
Merge pull request #284 from nramirezuy/cmd-parse-pipelines

Command parse, --pipelines argument added
Update faq.rst

spider.DOWNLOAD_DELAY is deprecated
Merge pull request #288 from kmike/patch-1

Update faq.rst
mock server is slow bringing up on busy builders
test fixed
test_crawl: make mock server print a line when ready, and wait for that line to start tests, instead of waiting for an arbitrary time
Merge pull request #291 from nramirezuy/cmd-parse-pipelines

parse pipelines test fixed
added copy method to item
Merge pull request #290 from nramirezuy/item-copy

added copy method to item
deleted unused import
Merge pull request #292 from nramirezuy/item-unusedimport

deleted unused import
ported code to use queuelib
Merge pull request #77 from shane42/master

Cookie handling performance improvement
rfc2965 is dead

- It is not enabled by default in python cookielib
- Mozilla rejected implementing it https://bugzilla.mozilla.org/show_bug.cgi?id=208985
- Netscape cookies still rules
- It was superseded by RFC6265 which is the facto protocol formalized