fix a possible error in contracts post hook
command with multiple crawlers, fix check command
disable logging for scrapy check
fixed typo to parallel fix on 0.16 branch
correction to description of example XPath retrieval in overview doc
also fetch alternate URLs from sitemaps, see #360
Merge pull request #361 from hmsimha/master

Doc fixes: Minor typo (was fixed on 0.16 branch so I figured it could be on master as well) and an error in the overview doc.
fixed scrapy.utils.gz.gunzip() broken after changes from Python 2.7.3 to 2.7.4
updated release notes and bumped version to 0.18.0
bumped version to 0.19.0
fix contributters list format
tox.ini: disable sitepackages on windows, as a compiler is often not available
adjust http11 pool size to per-domain concurrency
added a python native classes item exporter
Merge pull request #366 from kalessin/exporter

added a python native classes item exporter
minor updates to 0.18 release notes
add docstring to PythonItemExporter
#327 - Support STARTTLS / SSL option in email sender
Merge pull request #367 from berendiwema/master

#327 - Support STARTTLS / SSL option in email sender
FilesPipeline which enalbes to download any files.
It has been extracted from ImagesPipelines.
ImagesPipeline is built on top of FilesPipeline and consist only with convert image and thumbnail generation logic.