* Selfify example for how to access files article
* Restored selfify.js and updated choose_file.js as suggested by Luca
* Updated comments
* Updates for feedback from Will
* Updates from the second round of feedback
* removed activetab from manifest, removed document.body.appendChild(info);, renamed the content script (selfify > content), renamed the listener (selfify > injectImage) and moved example to imagify folder.
* Correctly renamed folder and update manifest.json
