Link student to Operation
Merge branch 'master' of github.com:fardus/madrasse-gestion into hotfix/MAD-17_login_sur_administration

Conflicts:
	src/Madrasse/AdminBundle/Entity/Operation.php
	src/Madrasse/AdminBundle/Resources/views/Operation/view.html.twig
hotfix/MAD-17_login_sur_administration
hotfix/MAD-17_login_sur_administration