[*] Added Buses: The 677 models from 1977 and 1978 (with 13 and 19 repaints, respectively).
[*] Bug Fix: Fixed the missing emergency switch lamp on the 1981 vehicles.
[*] Documentation: Corrected and updated the documentation.
[*] Passenger Control: Fixed hatch control on hatchless vehicles.
[*] Name Correction: Corrected the naming of the 677E 1978 versions (file names remain unchanged: 1978_1 corresponds to 1977, 1978_2 corresponds to 1978).
[*] Font Registration: Fixed font registration for duplicate state numbers with setvars 22, 23, and 24 (except for the 677E).
[*] Miscellaneous Fixes: Several other minor bug fixes.
