add autoupdate repositories when change objects Mark, Group,Student
Merge branch 'master' of https://github.com/romerosh/moc_testing
impl attach ORM objects
add MarksRepository
Merge branch 'master' of https://github.com/romerosh/moc_testing

Conflicts:
	src/main/app/Main.java
fix Main
GroupsRepository.addStudent() : fix bug