ignore Pods folder
Merge branch 'master' of github.com:siuying/IGHTMLQuery
Add [node queryWithCSS:cssSelector] method, which allow query of nodes with CSS Selector.

- Add CSSSelectorConvert as dependency
- Add queryWithCSS: to IGXMLNode and IGXMLNodeSet
- Add ruby interface node.css(selector) to XMLNode and XMLNodeSet
Merge branch 'master' of github.com:siuying/IGHTMLQuery

Conflicts:
	Podfile.lock
Merge branch 'css'

Conflicts:
	Podfile.lock
Bump version to 0.7.0
Cleanup XMLNode, use Native#alias_native whenever possible.
Update dependency.