Improve robustness in case of input corrupted data from other mods.
Apply intensive check and error reporting to avoid null-reference crash.

1.5 and 1.6 now have the same Assembly.
- C#: Usuing reflection to get TurretDef field.

Retrospective update for V1.5: fix skipping some turrets

Update to 1.6 and new CE & VF versions

Make sure you are on the latest CE (Combat Extended) and VF (Vehicle Framework) versions.
CE has not yet been released for 1.6, so use the GitHub version instead (Development branch).

Fixes null-reference exceptions.
Corner cases:
- Upgrade Tree without any real upgrades inside (no "upgrades" node)
- Turret upgrade removes turret without adding any new (no "turrets" node)

C# Clean-up

Complete rewrite of the mod on C#: now it goes through all vehicles and automatically insert the links.

Add: RimThunder - Warhorse of Reich
Add: CE Patches of Landkreuzer P1000 Ratte
Add: Object 279 for RimWorld
Add: R3 Capraia

Hotfix: Korean Armory II - Vehicles (check if vehicle exists)

Add: Mechanization - MobileWorker
Add: The Dead Man's Switch - Motorized