Now using cordova 3.5

Pointing to 3.5.0 tag in cordova submodule
Using latest code for contacts plugin in ContactExplorer

No issues found running sample apps and tests

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However there is still work needed in the SalesforceMobileSDK-CordovaPlugin repo (which gets used when using cordova cli tool to create apps and add the SalesforceMobileSDK plugin to it).