update validation part 1
Merge branch 'master' of https://github.com/HrvojeDoesNotSeeSharp/TrainingPlanner

Conflicts:
	TrainingPlanner/Views/Home/DodajClana.cshtml
	TrainingPlanner/Views/Home/DodajTest.cshtml
	TrainingPlanner/Views/Home/IzmijeniClana.cshtml
	TrainingPlanner/Views/Home/IzmijeniTest.cshtml