https://blueprints.launchpad.net/or/+spec/new-sound-triggers tweaks on brake discrete triggers, small refactoring, added new variable trigger to .sms parameters: BrakeCylControlled, BrakeCyl_Inc_Past, and BrakeCyl_Dec_Past which are expose the brakecylinder pressure in PSI. Can be used for example: brake rub sounds.
Update of the OR manual; added info about steam locomotive carriage heating (8.4.2.4). Revised info about SignalNumClrAhead (10.14). Co-editing by Sid Penstone.