Added image rotation to MediaFile images.
Added image rotation to MediaFile images.

Sniffs exif data. Implementation was tested on photos from several
different cameras, but further testing may be needed to confirm that
orientation codes are consistent.

mjl/feincms,michaelkuty/feincms,feincms/feincms,hgrimelid/feincms,nickburlett/feincms,joshuajonah/feincms,feincms/feincms,joshuajonah/feincms,nickburlett/feincms,joshuajonah/feincms,joshuajonah/feincms,matthiask/django-content-editor,matthiask/feincms2-content,feincms/feincms,matthiask/feincms2-content,michaelkuty/feincms,pjdelport/feincms,mjl/feincms,michaelkuty/feincms,nickburlett/feincms,matthiask/django-content-editor,nickburlett/feincms,pjdelport/feincms,matthiask/feincms2-content,matthiask/django-content-editor,matthiask/django-content-editor,michaelkuty/feincms,hgrimelid/feincms,hgrimelid/feincms,mjl/feincms,pjdelport/feincms