Controller Support

[NXXR]

Changelog:

• Adds VRPN to externals
• Builds VRPN Server and config (for Original Xbox360 Controllers) into the release/bin folder
• Starts VRPN Server instance when starting cosmoscout
  • controller has to be plugged in before starting cosmoscout
  • hot-switching does not work (if the controller looses connection/is unplugged cosmoscout needs to be restarted)
• Adds Vista DFN Control Scheme for controllers
• Adds Vista DFN to use mouse and controller, picking the latest position of either device
  • controller and mouse have their own, independent positions currently
• Adds Markdown Mermaid diagrams as documentation for the controller DFNs in a doc folder at config/base/vista/xml

Things to consider that are not in this PR:

• Add/Display a custom in-software cursor for the controller mouse to be visible

  • Changes for Mouseray workaround:

    in `config/base/scene/simple_desktop.json` add: ```json "enableMouseRay": true, ``` to top level settings (`startDate` etc.) --- in `src/cs-graphics/MouseRay.cpp` change/add: ```c++ mRayTransform->SetScale(0.005F, 0.005F, 30.F); mRayTransform->SetTranslation(0.F, 0.F, -1.F); ``` at ll. 86ff
• Add more controller options to the config and DFNs
• Look into the Mouse-Controller-Negotioator to check if the controller can use the latest mouse position for the curor movement instead of storing its own position
• VRPN Server is provided as an .exe and is only added to the batch scripts and is therefore currently only available in the windows builds.

[coveralls]

Pull Request Test Coverage Report for Build 2500177461

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 3.01%

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Totals
Change from base Build 2488370625:	0.0%
Covered Lines:	496
Relevant Lines:	16479

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💛 - Coveralls

[Schneegans]

With #360, is this branch now obsolete? What do you think, @JonasGilg?

[NXXR]

As far as I know, Jonas got all he needed out of this. And since the SDL Contorller Support seems to be working reasonably well (pending some more tests) this seems obsolete to me.