Rotate images based on EXIF orientation data

[joshheinrichs]

See http://stackoverflow.com/questions/4266656/how-to-stop-php-imagick-auto-rotating-images-based-on-exif-orientation-data

[joshheinrichs]

There's easy support for this in imagick.v2, but not imagick.v1. I'm not entirely sure which version of imagemagick Travis CI supports, but using it on the department machine would not be a problem.