EXIF extraction, geolocation map, image rotation

EXIF extraction, geolocation map, image rotation

- Images are now rotated based on EXIF image orientation
  (in case the image isn't flipped on X or Y axis or
  correctly oriented, then we do nothing)
- *Always* create a medium.jpg in image.processing, for
  the sake of rotation of display image
- Extract EXIF and GPS tags from images and insert them
  into media_data
- Geolocation map display added to media.html
- EXIF display added, then removed. It is not in this
  revision, although some of it is (the "EXIF" h4
  header). Need to make it presentable, filtering out
  purely robotical tags, perhaps.