Now the user can override special skynet properties from the unit.yaml of the main Radar of the sam site. Which unit needs these overrides can be looked up over here: https://github.com/walder/Skynet-IADS/blob/develop/skynet-iads-source/skynet-iads-supported-types.lua
- fixed wrong exclusion of groups with the first unit dead but still able to participate
- added some exception handling in the lua script for groups which skynet is not able to control. preventing scripting errors