Automatic merge of T1.5.1-376-g885592329 and 12 pull requests

- Pull request #570 at de7a14f: Experimental glTF 2.0 support with PBR lighting
- Pull request #732 at 3acb653: Improvements for air brakes
- Pull request #751 at 00981a2: Web interface to control cab controls with external hardware
- Pull request #799 at dc03850: Consolidated wind simulation
- Pull request #802 at 4d198e4: Added support for activity location events to the TrackViewer
- Pull request #803 at 7157e08: Various adjustments to steam adhesion
- Pull request #813 at ff454eb: Refactored garbage generators
- Pull request #815 at a5cc165: chore: Add GitHub automatic release notes configuration
- Pull request #818 at 73b637f: Allow independent drive axles for locomotives
- Pull request #820 at 6e7a5b6: delay option for masterkey does not delay switch off
- Pull request #821 at e0fa5a8: Adds suppression of safety valves
- Pull request #822 at 82ef736: battery switch two buttons option in combination with a delay

Author: openrails-bot

Source/Documentation/Manual/physics.rst

@@ -2347,6 +2347,21 @@ brake features.
 Brake system charging time depends on the train length as it should, but
 at the moment there is no modeling of main reservoirs and compressors.
 
+For EP brakes, two variants are available:
+
+- If ``Wagon(ORTSEPBrakeControlsBrakePipe`` is set to 0 (default situation),
+an electrical wire (application wire) provides simultaneous fast brake application
+along the train. Release time will be fast if standard air brake haven't been applied,
+otherwise air brakes will determine release time. Typically this system is present
+with Train Brake Controllers having an EP-only application section, followed by an
+air application portion which serves as a fallback system.
+- If ``Wagon(ORTSEPBrakeControlsBrakePipe`` is set to 1, brake pipe is charged and discharged
+simultaneously at each car in the train, providing fast and uniform brake application and release.
+The locomotive instructs the cars to "charge" or "discharge" the brake pipe to reach
+a reference pressure. Standard triple valves or distributors will follow brake pipe variations
+actuating the cylinders. This system is sometimes called "UIC EP brake". It is typically the system
+used in high speed trains.
+
 .. _physics-brake-controller:
 
 Train Brake Controller Positions