Automatic merge of T1.6-rc3-30-gdf7bf1a26 and 9 pull requests

- Pull request #1104 at c039a26: Handle simple adhesion within the axle module
- Pull request #1057 at 1c2bcb4: Switchable brake system
- Pull request #1086 at e10390b: Add Settings Exporter tool (copy settings to INI, etc)
- Pull request #1091 at 2391bc0: Automatic speed control
- Pull request #1110 at 387388e: Fix Activity Runner persists after loading exception
- Pull request #1115 at 270f22f: Do not activate ETS switch if no suitable cars are attached
- Pull request #1121 at 91d2d26: Manually Override Articulation
- Pull request #1082 at 5845a1a: Allow variable water level in glass gauge
- Pull request #1081 at 689494b: Brake cuts power unification

Author: openrails-bot

Source/Documentation/Manual/features-rollingstock.rst

@@ -403,6 +403,14 @@ OR supports tilting trains. A train tilts when its .con file name contains the
 
 .. image:: images/features-tilting.png
 
+Features to assist content creation
+===================================
+
+OR now includes some features that don't change the functionality of rolling stock, but simplify
+some steps of the content creation process or allow more control over content than was previously
+possible. The goal of these features is to save content creators' time, give additional power to
+creators, and to simplify the installation process for end users.
+
 Advanced articulation control
 -----------------------------