for looping in a directory

[ryancoe]

Firstly, thanks so much for sharing this code!!

Previously, when commenting out the lines for looping within a directory, the script would name every file without the basename (e.g., instead of converted/myfile_gs.pdf the name would be converted/_gs.pdf). This meant that files would overwrite each other. I've made a minor change to the basename call that I believe fixes this problem.