s/error/err
Merge pull request #71 from ralphtheninja/master

fixed incorrect description of second parameter to add() + some spelling errors
6.3.12
Merge pull request #61 from rvagg/emit-error

typo
6.3.13
update ltgt
refactor out range stuff into ltgt
6.3.14
delete all special range handling code, yay!
update ltgt
6.3.15