TSW3/4 visual normalization

Second version:
Here is version two with great visual improvements. I redid the clouds, overhauled lighting and added some basic scalability settings from Epic's Unreal 4 documentation.

Features:
• Clouds have little to no impact on frames with this engine.ini. Therefore, I recommend using ULTRA for clouds!
• Bigger, more distributed clouds
• Improved lighting

There are now two versions available:

1. High bloom settings, with UE4 default value
2. Default bloom by DTG

I recommend using NVIDIA's DL-DSR scaling or similar techniques and in-game screen scaling set to 100% for best image quality.

How to activate DSR on NVIDIA graphic cards:

1. Open Nvidia Control Panel and go to Manage 3D settings.
2. In Global Settings choose DSR - Factors and activate both DL scaling in the dropdown menu. Save it.
3. Start TSW and in the settings go to screen resolution and pick one of the newly added ones. These are the DSR ones and should have the highest resolution.

First version:
Basically uses the recommended settings for lighting by Epic Games for the Unreal Engine 4.

Here are some perks:
• Normalization of auto exposure and lighting
• Removed the in-cab overexposure and other weird adjustments to lighting done by DTG
• Dimmed the headlights of all locomotives that have their lights correctly assigned to be headlights
• Reworked the clouds - you get high detailed, two layered clouds in low resolution, which actually look really good and don't affect frames that much
• Increased range on all exterior cameras