Fixed removing entity (trouble with deleting Racer). Spring security in progress.
Fixed deleting. Need to fix deleting All car classes for racer and delete racer.
Fixed adding/deleting racer.
Fixed deleting documents.
Fixed deleting Competitions, CarClasses. Code refactore.
Fixed registering racers, redirection, when adding race results.
Adding result to a race doesn't works.
Resolved conflicts.