Temporarily turned off exif data read. One of the files in the current
folder has issues and I had other fish to fry...
-Rework some of the try/except logic around checking if an image file
-Call top level function in image_metadat, comments around old fn def
-Add code to rename imagedata.json if save would overwrite it.
-ADD comments because I already forgot how some parts of the data model was supposed to work
Only check EXIF metadata for JPG and TIFF formats
Made a TODO block at top
Organize the MVC stuff and put all the global fn at top
Add function to load info from all the .json files