Add script for deleting duplicate keys.

Signed-off-by: Tyler O'Meara <Tyler@TylerOMeara.com>
Should fix a bug where the script claimed to have deleted more keys than it did.

Signed-off-by: Tyler O'Meara <Tyler@TylerOMeara.com>
Merge pull request #184 from Acidity/feature/fixKeyDup

Add script for deleting duplicate keys.