Modifies `-addOperation:` on `OPOperationQueue` and it's reference to `operation` within various blocks. Explicitly naming operations returned by blocks to `anOperation` as to not conflict with the method parameters variable `operation`
Modifies `-addOperation:` on `OPOperationQueue` and it's reference to `operation` within various blocks.
Explicitly naming operations returned by blocks to `anOperation` as to not conflict with the method parameters variable `operation`

colinmcardell/Operative,pronebird/Operative,Kabal/Operative