Reading EXIF meta data from image files

Extract Exif (Exchangeable image file format) from Images:
http://stackoverflow.com/questions/22352977/how-to-detect-if-image-from-photo-library-was-taken-by-iphone-camera-or-imported
http://chariotsolutions.com/blog/post/take-and-manipulate-photo-with-web-page/
https://github.com/exif-js/exif-js