- sql refactoring
- fix incorrect function's Сase (handler/map.php)
- fix group attaching (incorrect attaching/deattaching)
- fix incorrect sql function usage (see InternalIsMapCreated in ChangeDisciplineControl)
- fix grades without degree (sp CreateGrade), (+sql fixes file)
- add error handling for module name changing
- remove redundant console.log
- fix lost extra rates (student index page)
- improper exam rate (student index page)

Client js tried to get (incorrectly) discipline id from URL and got error at the server side.

Separated logic and representation, removed unused functions, duplicates

1. Discipline models have the direct access to fields, for example: $discipline->subjectName, so you don't have to remember them (press ctrl+space). Improves static code analysis. Also, if you make a mismatch, ErrorException will be thrown — this is the most important improvement.

2. There are some operations on disciplines (attach new teacher, transfer discipline to another teacher, an so on), so you can use them: $discipline->attachTeacher(53).

3. Discipline model has array access operators, so you must not convert instances with toArray() method. A common way is:

/* PHP */
$d = Model_Discipline::load($id);
$d['extraField'] = 127;
$twig->Discipline = $d;  // is ok, cause $d is like an array

/* Twig */
{{ Discipline.extraField }}   // call $d->offsetGet('extraField') method

4. Models Faculty, Student, Teachers and Groups have `getDisciplines()` method, and an array of Model_Discipline will be returned.

5. We use camelCase for all fields: in twig, on the PHP level and also in the database.

1) Incorrect students list
2) problems with output file.