Support for password encrypted zip files

 Added optional parameter to FileUtils:: getFileDataFromZip to support password protected zip archives. From the discussion in: http://discuss.cocos2d-x.org/t/cocos2dx-load-from-password-protected-zip/16280
 I've committed it to the depts repo:
https://github.com/cocos2d/cocos2d-x-3rd-party-libs-bin/pull/20