1) exam page: hide hidden div with ( json data )
2) update session info on profile/settings changes (User.php)
3) fix profile page model ( Model_Teacher )
4) fix change discipline's control type ( sql )
5) fix sql response in bind group ( repeated binding problem )

# Conflicts:
#	~dev_rating/application/bootstrap.php

Russian constants are moved to twig & RusLang modules.
Functions were renamed to Semesters::load($id) & Semesters::loadAll().

# Conflicts:
#	~dev_rating/application/classes/Controller/Teacher/Discipline/Edit.php
#	~dev_rating/application/classes/Model/Account.php

Moved some functions from Account to Model_Account & Model_Teacher.

In windows (not sure about linux) "localhost" will be parsed in HOSTS file, so it takes too much time.