fix dont settings on meta behaviour, add docs and tests
jsonrpc webservice moved to https://github.com/scrapy/scrapy-jsonrpc repository
Merge branch 'jsonrpc-split'
Merge pull request #846 from rocioar/master

fix dont_merge_cookies bad behaviour when set to false on meta
Update webservice.rst
removed scrapy-ws.py, moved to scrapy-jsonrpc package
[WIP] Support ::nth(n), ::first, ::last pseudo selectors (fixes #842)
Simplify predicate when not using "descendant-or-self::"
Add documentation for new pseudo-classes
Implement CSS extension translation as pseudo-classes
Simpler implementation using cssselect's .add_star_prefix()