It will be loaded _only_ on the sign in page!

But we still have another helpers.

So you have access to them from any module / macros.

Conflicts:
	~dev_rating/application/classes/Controller/Admin/Profile.php

* Model User has constants to check access for pages
* Some routes are moved to separate files (app/routes/api)
* New abstract model Container for complex objects like Discipline & Student (with -> access operator)
* New DeanOffice controller with access checks
* New SQL procedure to get info about students
* Profile page for students (/dean_office/students/127)

1) Now user info stored in session
2) Merge GetAccountInfo & GetPersonalInfo

+ Code refactoring in the AdmStudent controller

* Controller_UserEnvironment is an abstract class, which defines $twig variable, and calls $twig->render in the after() method.
* $twig contains $twig->User variable by default.
* As I have read, it's totally recommended not to use $twig->Variables, so I defined $twig->set([params]) syntax
* Twig supports "fluent interface", so use $twig->set(...)->set_filename();
* Divided DeanOffice/Credits.php & moved part to Handler/

Conflicts:
	db/StoredProcedures.sql