Detects when the host directory (GameData\ModuleManager) was removed, and kill ModuleManager.dll in response. #10

Following suit with KSP-ModularManagement/KSPe#65 , do the same on Module Manager /L, i.e.:

• Detect if the host directory was removed;
• If positive, remove both Module Manager /L and the 666_ModuleManagerWatchDog.dll from user's GameData.
  • Don't touch Forum Module Manager if existent.