Well, wasn't really using img/...
Removes references to CaseInsensitive from the tagset test since it's been removed from TagSets
Adds initial attempt at node significance, reducing the influence of subsets that could double-count highly associated tags
Adds a loop to test multiple images until the user presses Ctrl-C
Fixes an issue where case insensitivity is handled backwards. Also, toLower apparently doesn't exist. Doh.
Reverses sorting direction so the first items in the output are the highest ranked.