$even and $odd constant are loss

[carlosfcocruz]

I fixed this issue by adding before this line
https://github.com/scalyr/angular/blob/master/src/js/directives/slyRepeat.js#L110

newElement.scope.$even = i % 2 === 0;
newElement.scope.$odd = i % 2 === 1;