Added translation to postfix form. Reviewed at https://codereview.appspot.com/6851127/
Added translation to postfix form.
Reviewed at https://codereview.appspot.com/6851127/

Update issue 29
denfromufa/mipt-course,denfromufa/mipt-course,denfromufa/mipt-course,denfromufa/mipt-course