Adding CUBIC_M_S as valid cabview unit, documentation improvements

Author: SteelFill

Source/Documentation/Manual/appendices.rst

@@ -58,6 +58,10 @@ Voltage                 volt                        V
 Mass Flow                                           g/h
 \                                                   kg/h
 \                       lb/h                        lb/h        lb/h
+Volumetric Flow         m^3/s           air flow    m^3/s
+                                        meters
+\                                                   ft^3/min
+\                                                   L/s
 Speed                   m/s             other       m/s         m/s             meter per second
 \                                                   km/h
 \                                                   kph         kph             kilometer per hour

Source/Documentation/Manual/cabs.rst

@@ -706,8 +706,8 @@ Here is an example implementation of ORTS_AIR_FLOW_METER as an analog dial::
 			DirIncrease ( 0 )
 		)
 
-Applicable user-defined units are CUBIC_FT_MIN and LITRES_S. Cubic meters per second will be
-used if no units are specified.
+Applicable user-defined units are CUBIC_FT_MIN, LITRES_S, and CUBIC_M_S. Cubic meters per
+second will be used if no units are specified.
 
 
 Animated 2D Wipers

Source/Orts.Formats.Msts/CabViewFile.cs

@@ -335,7 +335,8 @@ public enum CABViewControlUnits
 
         CUBIC_FT_MIN,
         LITRES_S,
-        LITERS_S
+        LITERS_S,
+        CUBIC_M_S
     }
 
     public enum DiscreteStates

Source/Orts.Simulation/Simulation/RollingStocks/MSTSLocomotive.cs

@@ -5429,6 +5429,7 @@ public virtual float GetDataOf(CabViewControl cvc)
                                 data = this.FilteredBrakePipeFlowM3pS * 1000.0f;
                                 break;
 
+                            case CABViewControlUnits.CUBIC_M_S:
                             default:
                                 data = this.FilteredBrakePipeFlowM3pS;
                                 break;