Automatic merge of T1.5.1-1004-g6fd841761e and 18 pull requests

- Pull request #799 at dfc715e: Consolidated wind simulation
- Pull request #839 at d00beb9: First phase of https://blueprints.launchpad.net/or/+spec/additional-cruise-control-parameters
- Pull request #876 at f92de76: docs: add source for documents previously on website to source Documentation folder
- Pull request #882 at 8f695a4: Blueprint/train car operations UI window
- Pull request #885 at 2728d6d: feat: Add notifications to Menu
- Pull request #891 at 9a1d6b2: Auto save
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #896 at 5866028: First implementation of https://blueprints.launchpad.net/or/+spec/specific-sounds-for-ai-trains
- Pull request #900 at c27f32d: DMI updates
- Pull request #903 at 3e390b8: Downloading route content (Github, zip)
- Pull request #912 at 359cfee: New Triple Valve Features Vol. 2
- Pull request #922 at abe2e52: Autopilot for timetable mode
- Pull request #946 at 66f836c: Advanced track sounds
- Pull request #949 at d29622b: Oil Burning Locomotive
- Pull request #952 at b2af1f5: Investigation - Pulsing graphics part 1
- Pull request #953 at a519452: Fix Lights Crash on Corrupt Shapes
- Pull request #954 at 84c2f4b: Add Support for Multiple Track Profiles
- Pull request #956 at 25193a8: Map settings saved

Author: openrails-bot