#3 EXIF Meta Tag handling

[Pete Davis]

Because FreeImage and Gfl SDK don't play well with EXIF data, all the EXIF data handling will be done via exiftool.

Since Exiftool is a command-line app, we'll be executing it and, for reading EXIF tags, we'll pipe the output into a file which we'll then parse.

This should all be done nicely via a wrapper class for ExifTool.