Adobe has released an update to Adobe Photoshop Touch for the iPad adding support for the Retina Display in the third-generation iPad along with the ability to work with higher resolution images. In version 1.3 users can now edit images of up to 12 megapixels in size, an increase from the application’s original 1600x1600 (2.5MP) limitations. The new version also adds new Shred and Colorize effects, support for Photo Stream and improvements to…