Lesson's length counting in teacher's contract

It is now possible to specify the length of each subject. So for example if you have English conversation lessons that do only add 0,5 to the total teachers contract, you can specify this in Subjects/Constraints dialog. This number only affects the teacher’s contract.

Note: If you also want to generate these lessons to be on certain positions, for example 0.5 lessons can only be at 1st period, you have to simply define timeoff.