Just now I managed to build the iOS app with Intel XDK, I didnt wanted to do that because I just wanted a simple Cordova app that I could manage and deploy on Xcode, but due to the problem with IAP not working on that build, and the nonexistent reply from Scirra I had to try that.
Nevertheless to build it was easy, I just got confused with my provisioning profiles and certificates but at the end I managed to have it builded successfully and deployed it on a device.
Official IAP Not working
Cranberry IAP Working good
With the Cranberry IAP plugin I was able to successfully make a purchase, I also got store listing and store available.
I will do some more testing for performance on the Intel XDK to see if its allright, then when I get home from work I will write maybe a tutorial on how to get all this working at least for the Intel XDK.