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
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
Corrected typo.
Merge pull request #402 from LorenDavie/master

Corrected typo.
docs: minor tidy up sample code and missing shell prompts.
docs: added section regarding setting up django's settings.
Merge pull request #404 from darkrho/djangoitem-docs

Add a section to DjangoItem docs page regarding setting up Django's settings.
Handling inconsistencies among Twisted releases