tweaked pa_exifautotran to only be called on jpegs, not all image types

TODO

@@ -1,15 +1,9 @@
-## PROD:
-    to deal with orientation issues
-        need to work out how to remove thumbnails, and then regenerate them (in optimal fashion )
-        update FILE set thumbnail=null, last???date=0
-
 ## GENERAL
 	* put try: around any os.remove, os.symlink etc.
             File "/code/pa_job_manager.py", line 1088, in CreateSymlink
             os.symlink(path, symlink)
             FileExistsError: [Errno 17] File exists: '/export/docker/storage/.pa_metadata/' -> 'static/Metadata/.pa_metadata'
 
-
 	* remove multiple Paths from SettingsIPath, etc.
 
     * should I change the rotation code to use that jpeg util to reduce/remove compression loss?