The Verge writes, Being part of the Nexus program has its perks — one of which is that Google provides factory images allowing advanced users to return their phones back to out-of-box condition. It may have taken a few weeks, but the stock, Android 4.1.1 images for the GSM Galaxy Nexus and Nexus S are now available for download. That's good news for Android enthusiasts who like to flash all manner of custom ROMs and kernels, as it allows them to easily go back to stock should they modify a bit too hard. You can also use the images to upgrade to Jelly Bean if you've yet to receive the update over the air,...