Adds exiftool.exe to get more EXIF details

exiftool.exe if an open source EXIF reading/writing program. Images that
are manipulated in PIL and saved lose all EXIF data. This tool allows
you to read all EXIF data including Nikon Makernote data and write it
into another image file.
Also added is an accessory watermarking program that requires the
image_utils.py module.