Add initail RS485 communication files.
Fix shell script highlighting
Start implementing bus communication module.
Bus_comm module ready for dry testing
Fix typo.
Exec flag for buscomm.
Test and fix CRC calculation. Ready for real HW comm test.
Reorganize: move everything a level up.
Fixes on buscom based on HW tests.
Outgoing communication works.
Reorganization
Test modifications - commit before merge