Update node-xcode dependency to 0.6.6
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cordova-cli

Conflicts:
	package.json
CB-5813 Fix missing quotes on update and ls commands
CB-5299 Cache pbxproj to avoid re-parsing it for each plugin.

Parsing pbxproj is very slow (~250ms on my machine). It is done for each plugin
that needs to add frameworks to the ios project.