Use $user or User::instance() instead

Reduced usages of UserInfo

Conflicts:
	db/StoredProcedures.sql
	~dev_rating/application/classes/Controller/Handler/FileCreator.php
	~dev_rating/application/classes/Model/Teacher/Rating.php

fix empty fullnames on rating page. fix teacher search on teacher binding page. fix undefined vars in sql

Conflicts:
	db/StoredProcedures.sql
	db/fix.sql
	~dev_rating/modules/account/classes/Kohana/Account.php