EXIF data is ignored when uploading images #1854

Describe the bug
When inserting an image that has EXIF rotation data, the rotation of the image isn't respected in the output.

Steps To Reproduce
Steps to reproduce the behavior:

1. Upload an image with EXIF rotation data
2. Insert into the page
3. See error in preview

Expected behavior
The EXIF rotation data should be considered when uploading the image so that it will display correctly

Screenshots

Your Configuration (please complete the following information):

• Exact BookStack Version (Found in settings): 0.27.4
• PHP Version: PHP 7.0.33-0ubuntu0.16.04.9
• Hosting Method (Nginx/Apache/Docker): Nginx