Add gitignore
Add photosort.sh

A simple script that relies on the 'exif' tool. When given a src dir
and a dest dir, the script will move all .jpg and .png files from
src dir into a YEAR/MONTH directory below the dest dir.
Add dupe detection to photosort.sh

Now if a dupe file is detected, the sha1 hash will be compared. If
the hashes match, then the originating file is deleted, rather than
moved over.