[RELEASED] for UE4: Complete Sky and Weather System

**Update: **Still an in the latest version of the plugin (trueSKYUE4Plugin_4.20.1_4.1a.204_x64).

Steps to reproduce:

  1. Create a blank new blueprint project.
  2. Package for Windows (completes successfully).
  3. Enable the plugin and restart the editor.
  4. Package for Windows (fails).