Add to CSRF warning the white list
Add to CSRF warning the white list

Brakeman receives CSRF warning on ApplicationController.
But, This change has been intentionally https://github.com/DefactoSoftware/Hours/commit/42dafa93d85589fcb56d020f4398e7246d5e6578.

DefactoSoftware/Hours,michalsz/Hours,DefactoSoftware/Hours,DefactoSoftware/Hours,michalsz/Hours,DefactoSoftware/Hours,michalsz/Hours,michalsz/Hours