added BirthDate for User entity
Added random generated BirthDate when trying to create new user (hit button "Create") on the Users/Edit view. Added BirthDate on the UserEditVm. Added LiveState, BirthDate when trying to save user in the UserService.
Implemented "Birthday for month" task
Added GetAgeTest
just a lil bit of reafctoring: Renamed from State to LiveState
changed type of the BirthDate prop to nullable
Merge branch 'master' of github.com:fomaa/Calendar
Birthday for month changes