New ready-to-go templates for iPad retina screens.

Hi, Tisho Georgiev!

I really love this project and it has helped me a lot recently. I'd like to add a little contribution to it.

I've added some new templates for ipad retina screens, which adjust layouts that were originally created in 2048x1536 resolution. Note that it uses the same iPad Mini's images.

This was a particular need in a recent project, so I hope it could help others at the same situation.

Thanks in advance,
Carlos.