[Initial import and first working version
Dougal Stanton <ithika@gmail.com>**20070716205020] 
[Change to single-line output
Dougal Stanton <ithika@gmail.com>**20070716211154] 
[Refactor
Dougal Stanton <ithika@gmail.com>**20070718101540] 
[Clarify keepOneDiff
Dougal Stanton <ithika@gmail.com>**20070719095310] 
[Clean up w/ suggestions from H Cafe
Dougal Stanton <ithika@gmail.com>**20070719142942]