Add extra 4xx response codes for proper handling

Only 405 Method not allowed, 406 Not acceptable, 409 Conflict, and 410 Gone have been added to the list.
Merge branch 'develop' of github.com:kurtdoherty/eve into kurtdoherty-develop
Add extra 4xx response codes for proper handling
Kurt Doherty
Merge branch 'kurtdoherty-develop' into develop