PY3: use MutableMapping instead of DictMixin
items: Use BaseItem.__hash__ and six.add_metaclass decorator
pytest 2.6.0 is on pypi now
Add tox env for python 3.4
Merge branch 'py3-port'
Update shell.rst typo

There was a typo. 
"start" was mistyped as "star"
Merge pull request #820 from lisimia/patch-1

Update shell.rst typo
Add from_crawler class method to base Spider
Add from_crawler and deprecated set_crawler Spider tests
Change import order in test_spider
Connect spider_closed signal after a crawler is bounded to a Spider
Update from_crawler method as well as set_crawler on CrawlSpider
SpiderManager interface cleanup
Crawler interface cleanup
Settings copy, freeze and frozencopy support
CrawlerProcess cleanup changes
Update tests utils, fixing get_crawler and removing docrawl
Adjust spidermanager tests