Add Reskin, Test, Upload iOS Game App

I have the graphics to reskin a gaming app that I have purchased. I need to replace old graphics with new graphics. The graphics may need to be resized. I will try to resize as much as I can. However I do have the new graphics. Then I need to Xcode files to work and verify the file working to insure no errors. Once the build shows to be successful I need the app to be uploaded to my developers account.