also fetch alternate URLs from sitemaps, see #360
improved changes to allow retrieval of alternate links in sitemaps, see #360
Do not silence download errors when request errback raises an exception
Do not log IgnoreRequest exceptions as download failures
renamed to sitemap_alternate_links and added default value, see #360
added test case for comments, see #363
Merge pull request #390 from kmike/mock-in-tox

mock is required for running tests
Update request-response.rst

Fix small doc typo (too many backticks)
Merge pull request #391 from amferraz/patch-2

Update request-response.rst
add note about enclosing urls with quotes when running from command-line. closes GH-384
Make ITEM_PIPELINE setting a dict

This is for consistency with how spider and downloader middlewares are
defined. ITEM_PIPELINE_BASE was also added and both remain empty.

Backwards compatibility is kept (with a warning) with list-based
ITEM_PIPELINES.
Merge pull request #393 from scrapy/itempipe-dict

Make ITEM_PIPELINE setting a dict
fix ITEM_PIPELINES setting handling

* item_pipelines variable was unused so the fallback didn't work;
* added support for fallback in case of ITEM_PIPELINIES defined as set.
fix sphinx references in doc
Merge pull request #363 from taikano/sitemap_alternate

also fetch alternate URLs from sitemaps, see #360
Update practices.rst

With this modification scrapy runs the spider with project settings. The previous example ran only with default settings resulting in ignoring all user settings as pipelines for example.
Merge pull request #399 from irgmedeiros/patch-1

Update practices.rst
Update the second code example

Update the second code example to reflect the last change in the first example.
Added dynamic creation of item classes to practices.rst.
Merge pull request #401 from LorenDavie/master

Added dynamic creation of item classes to practices.rst. Issue