Automatic merge of T1.5.1-145-g5f2ded579 and 14 pull requests
Pull request #652 at 918fdb103: Add button functions to Raildriver
Pull request #706 at 570ab2172: Extended door functionality
Pull request #719 at 13a16388a: Upgraded to MonoGame 3.8.0 (+ small update for other libraries)
Pull request #722 at fb9079ebe: Fix Windows Forms deprecations in ActivityEditor
Pull request #732 at 9cffa6d90: Improvements for air brakes
Pull request #740 at b3e66cac0: Refactored the circuit breaker and the traction cut-off relay in order to use the same design pattern as the C# signal scripts (compatible with current scripts)
Pull request #744 at 3c2dc07a8: Fixed and improved cabview control conditions related to power supply state
Pull request #746 at 4609acb3e: Website release 1.5.1
Pull request #748 at 4f0e8787b: latitude/longitude fix for bug 1393111
Pull request #749 at db5764c9e: OpenRailway Map
Pull request #753 at ab8fe3214: Extends CabControls for user input